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MSD Iridium Spark Plug 3720

MSD Iridium Spark Plug 3720
$14.99 ea
NEWOUT OF STOCK
Model: 4017178
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
MSD's spark plugs are engineered to improve the efficiency of the combustion process to create the most power possible combined with increased durability. The center tip of the plug is made from iridium to promote the best spark and increase resilience. A proprietary ceramic material enhances the dielectric strength of the plug housing forcing the spark, even under extreme cylinder pressures, to jump across the plug gap to the ground electrode. This electrode is machined to expose more spark to the incoming gases to promote the most effective combustion event possible.
Features:
  • Proprietary plug design inside and out
  • Designed for use on high performance vehicles that utilize high output ignition systems
  • Machined electrode increases exposure to the flame to improve combustion
  • MSD’s proprietary ceramic formula provides the highest dielectric strength
  • Yttrium ground electrode reduces the chance of pre-ignition
  • Iridium tip improves cold starts
  • All spark plugs tested prior to packaging and shipping
  • Unique insulator design improves spark isolation
  • Lower voltage Requirements for longer coil life
About MSD Ignition

Racers never stop experimenting as they search for every way to wring out more power or handling performance to to gain an edge over the competition. The team at MSD is no different as we strive to deliver the products you  need to meet your performance goals. We continue to innovate and invent components and technology that deliver  performance and reliability with products that are easy to use and install. 

Over the course of 40-plus years, MSD Performance has been driving the development of innovative components  that helped shape the way our cars race and perform. From super speedways to road courses, land speed racing to  top fuel dragsters, and of course your traditional hot rod, MSD has provided the components to fire nearly anything in  motorsports.

MSD was the first company to develop and offer the multiple sparking, capacitive discharge ignition for engines. The line of MSD 6-Series Ignitions are the most popular aftermarket ignitions in the world due to our race-proven performance on the track and our reliability on the street!

Early on, MSD focused squarely on ignition systems with revolutionary products like the multiple sparking CD ignition, timing and rev controls, billet aluminum distributors and the Pro-Mag, an incredible breakthrough in power  and endurance. 

Today MSD is developing electronics for your entire powertrain. The Atomic EFI systems for the LS engine platform and throttle body are now complemented with a transmission controller. Our DynaForce Starters and Alternators  ensure that your engine cranks over to fire up and the Alternators keep it charged. MSD is poised to deliver components that work and communicate together to provide performance and value.

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine Fitment Notes
Buick Skylark Base 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark Base 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark Base 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark Custom 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark Custom 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark SR 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark S 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark S 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark S 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark Sport 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1967 6.6L / 400 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1968 5.7L / 350 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1969 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1970 7.5L / 455 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1971 7.5L / 455 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1972 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1975 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1976 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1977 5.0L / 305 / V8
5.7L / 350 / V8
4.9L / 301 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1978 5.0L / 305 / V8
5.7L / 350 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1979 5.0L / 305 / V8
5.7L / 350 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1980 2.5L / 151 / L4 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1981 2.5L / 151 / L4 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1982 2.5L / 151 / L4 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Skylark 1983 2.5L / 151 / L4 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Special 1968 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Special 1969 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Sportwagon 1968 6.6L / 400 / V8
5.7L / 350 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Sportwagon 1969 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Sportwagon 1970 5.7L / 350 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Sportwagon 1971 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Buick Sportwagon 1972 5.7L / 350 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle Base 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle Concours Estate 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle Concours 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle Greenbrier 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle Malibu 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle Nomad 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle SS 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Chevelle 1971 6.6L / 400 / V8
5.0L / 307 / V8
6.6L / 402 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1972 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1973 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Base 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Classic 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Classic 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Conquista 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Custom 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Custom 1972 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Custom 1973 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Royal Knight 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Royal Knight 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino Royal Knight 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino SS 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1970 7.4L / 454 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1971 5.0L / 307 / V8
6.6L / 400 / V8
6.6L / 402 / V8
4.1L / 250 / L6
5.7L / 350 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1972 5.0L / 307 / V8
Chevrolet El Camino 1973 5.0L / 307 / V8
Chevrolet El Camino 1976 4.1L / 250 / L6
5.7L / 350 / V8
5.0L / 305 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Light Duty
Chevrolet El Camino 1977 4.1L / 250 / L6
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Light Duty
Chevrolet El Camino 1978 5.7L / 350 / V8
5.0L / 305 / V8
3.8L / 231 / V6
3.3L / 200 / V6		 Light Duty
Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1979 4.4L / 267 / V8
5.0L / 305 / V8
5.7L / 350 / V8
3.8L / 231 / V6
3.3L / 200 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Light Duty
Chevrolet El Camino 1980 4.4L / 267 / V8
5.0L / 305 / V8
3.8L / 229 / V6
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1981 4.4L / 267 / V8
5.0L / 305 / V8
3.8L / 229 / V6
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1982 4.4L / 267 / V8
5.0L / 305 / V8
3.8L / 229 / V6
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1983 5.0L / 305 / V8
3.8L / 229 / V6
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1984 5.0L / 305 / V8
3.8L / 229 / V6
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1985 4.3L / 262 / V6
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet El Camino 1986 5.0L / 305 / V8
Chevrolet El Camino 1987 4.3L / 262 / V6
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Base 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Brougham 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass LS 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Salon 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Salon 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Salon 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Vista Cruiser Brougham 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Vista Cruiser 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass Vista Cruiser 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1970 4.1L / 250 / L6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1971 4.1L / 250 / L6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1976 4.1L / 250 / L6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1977 3.8L / 231 / V6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1978 5.7L / 350 / V8
3.8L / 231 / V6
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1979 5.7L / 350 / V8
3.8L / 231 / V6
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1980 3.8L / 231 / V6
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1981 4.4L / 267 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile Cutlass 1985 5.0L / 305 / V8
Oldsmobile Cutlass 1986 5.0L / 305 / V8
Oldsmobile Cutlass 1987 5.0L / 305 / V8
Oldsmobile F85 1970 4.1L / 250 / L6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Oldsmobile F85 1971 4.1L / 250 / L6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac GTO 1972 6.6L / 400 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac GTO 1973 6.6L / 400 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Base 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Brougham 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Brougham 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Brougham 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Brougham 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix Brougham 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LE 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LE 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LE 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LE 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LJ 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LJ 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LJ 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix LJ 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix SJ 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix SJ 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix SJ 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1972 6.6L / 400 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1973 6.6L / 400 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1974 6.6L / 400 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1975 6.6L / 400 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1976 5.7L / 350 / V8
6.6L / 400 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1977 5.7L / 350 / V8
6.6L / 400 / V8
6.6L / 403 / V8
4.9L / 301 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1978 5.0L / 305 / V8
4.9L / 301 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1979 5.0L / 305 / V8
4.9L / 301 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1980 5.0L / 305 / V8
4.9L / 301 / V8
4.3L / 265 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1981 4.3L / 265 / V8
3.8L / 231 / V6
4.4L / 267 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1982 4.1L / 252 / V6
3.8L / 231 / V6
4.4L / 267 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1983 5.0L / 305 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1984 5.0L / 305 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1985 5.0L / 305 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1986 4.3L / 262 / V6
5.0L / 305 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Grand Prix 1987 4.3L / 262 / V6
5.0L / 305 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Base 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Base 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Base 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Base 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Base 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Base 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Safari 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Safari 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Safari 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Safari 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Sport Coupe 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans Sport 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1970 4.1L / 250 / L6
5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1971 4.1L / 250 / L6
5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1972 4.1L / 250 / L6
5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1973 4.1L / 250 / L6
5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1974 4.1L / 250 / L6
5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1975 4.1L / 250 / L6
5.7L / 350 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1976 4.1L / 250 / L6
4.3L / 260 / V8
5.7L / 350 / V8
7.5L / 455 / V8
5.0L / 305 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1977 4.1L / 250 / L6
6.6L / 403 / V8
3.8L / 231 / V6
5.7L / 350 / V8
4.9L / 301 / V8
5.0L / 305 / V8
6.6L / 400 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1978 3.3L / 200 / V6
3.8L / 231 / V6
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1979 3.3L / 200 / V6
3.8L / 231 / V6
5.7L / 350 / V8
4.9L / 301 / V8
4.4L / 267 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1980 4.3L / 265 / V8
3.8L / 231 / V6
4.9L / 301 / V8
3.8L / 229 / V6
4.4L / 267 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac LeMans 1981 4.3L / 265 / V8
3.8L / 231 / V6
4.9L / 301 / V8
3.8L / 229 / V6
4.4L / 267 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Tempest 1970 4.1L / 250 / L6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;

Specifications:

Emission Code 2
Heat Range 4
Hex Size 5/8
Length Standard
Part Type Spark Plug
Plug Style Code 6IR4Y
Product Type Spark Plug
Projected Tip Yes
Proposition 65 www.P65Warnings.ca.gov
Quantity 1
Reach 0.4375
Resistor Yes
Seat Type Tapered
Style Iridium
Thread Size 14mm
Warranty Limited 1 Year Warranty

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