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Doug's Headers 1978-88 GM G-Body Small Block 1 5/8" TRI-Y Header D370Y

Doug's Headers 1978-88 GM G-Body Small Block 1 5/8" TRI-Y Header D370Y
Doug's Headers 1978-88 GM G-Body Small Block 1 5/8" TRI-Y Header D370Y
from $1,515.18 st

Available Options

*
Model: 5124694
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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[More Info]
Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.
Features:
  • 3/8" thick machined flanges to prevent warping
  • CNC mandrel bent tubes ensure accurate fit and better flow
  • Heavy 16-guage tubing for longer life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating
About Doug's Headers

Doug's Headers are a fixture in the motorsports aftermarket, pioneering quality muscle car performance headers for decades. Unlike the competition, Doug's Headers prides ourselves on superior design detail resulting in a hassle-free installation for any application.

Downloads:

Download Name File Size
D370Y.pdf417.27KB
D370Y-B.pdf417.27KB

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 Years Engine Fitment Notes
Chevrolet El Camino 1978 5.0L / 305 / V8
5.7L / 350 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1979 5.0L / 305 / V8
4.4L / 267 / V8
5.7L / 350 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1980 5.0L / 305 / V8
4.4L / 267 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1981 5.0L / 305 / V8
4.4L / 267 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1982 5.0L / 305 / V8
4.4L / 267 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1983 5.0L / 305 / V8
5.7L / 350 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1984 5.0L / 305 / V8
5.7L / 350 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1985 5.0L / 305 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1986 5.0L / 305 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet El Camino 1987 5.0L / 305 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Malibu 1978 5.7L / 350 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Malibu 1979 4.4L / 267 / V8
5.7L / 350 / V8
5.0L / 305 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Does not fit with power glide transmission.
Chevrolet Malibu 1980 4.4L / 267 / V8
5.7L / 350 / V8
5.0L / 305 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Does not fit with power glide transmission.
Chevrolet Malibu 1981 4.4L / 267 / V8
5.7L / 350 / V8
5.0L / 305 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Does not fit with power glide transmission.
Chevrolet Malibu 1982 4.4L / 267 / V8
5.7L / 350 / V8
5.0L / 305 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Does not fit with power glide transmission.
Chevrolet Malibu 1983 5.7L / 350 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1978 5.0L / 305 / V8 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1979 4.4L / 267 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1980 4.4L / 267 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1981 4.4L / 267 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1982 5.7L / 350 / V8
4.4L / 267 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1983 5.7L / 350 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1984 5.7L / 350 / V8
5.0L / 305 / V8		 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1985 5.0L / 305 / V8 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1986 5.0L / 305 / V8 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1987 5.0L / 305 / V8 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Chevrolet Monte Carlo 1988 5.0L / 305 / V8 Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Requires removal or modification of locking steering columns if equipped.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Does not fit with power glide transmission.
Tri-Y
Oldsmobile Cutlass 1978 5.7L / 350 / V8
5.0L / 305 / V8		 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Oldsmobile Cutlass 1979 5.7L / 350 / V8
5.0L / 305 / V8		 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Oldsmobile Cutlass 1980 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Fits Factory Installed Chevrolet 265-350 small block engines.
Tri-Y
Pontiac Bonneville 1983 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Bonneville 1984 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Bonneville 1985 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Bonneville 1986 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1978 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1979 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1980 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1983 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1984 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1985 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1986 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y
Pontiac Grand Prix 1987 5.0L / 305 / V8 Does not fit with power glide transmission.
Fits Factory Installed Chevrolet 265-350 small block engines.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Requires removal or modification of locking steering columns if equipped.
Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
Tri-Y

Specifications:

Collector Attachment 3-Bolt Flange
Collector Diameter 2.5 IN
Collector Port Diameter 2.5 IN
Cylinder Head Port Shape Oval
Design Tri-Y
Flange Thickness 0.375 IN
Gasket Or Seal Included Yes
Gaskets Included Yes
Grade Type Performance
Header Style Tri-Y
Mounting Hardware Included Yes
Oxygen Sensor Port No
Part Type Exhaust Header
Port Shape Oval
Primary Tube Outside Diameter 1.625 IN
Proposition 65 www.P65Warnings.ca.gov
Tube Wall Thickness 16 GU
Warranty Time 24 Months

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