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Doug's Headers 1978-87 GM G-Body Big Block 2" Long Tube Header D318

Doug's Headers 1978-87 GM G-Body Big Block 2" Long Tube Header D318
Doug's Headers 1978-87 GM G-Body Big Block 2" Long Tube Header D318Doug's Headers 1978-87 GM G-Body Big Block 2" Long Tube Header D318
from $1,767.79 st

Available Options

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Model: 5124710
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market. This fitment is tailored for popular aftermarket engine swap kits. Doug's engine swap headers were developed to solve common fitment issues in tight spaces, making your swap process smoother. No more guesswork or modifications needed - just straightforward installations that save you time and frustration.
Features:
  • 3/8" Thick machined flanges to prevent warping
  • Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
  • Heavy duty 16-gauge tubing for long 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
D318.pdf323.97KB

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 Fitment Notes
Buick Century 1978 - 1981 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Buick Regal 1978 - 1987 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Chevrolet El Camino 1978 - 1987 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Chevrolet Malibu 1978 - 1983 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Chevrolet Monte Carlo 1978 - 1987 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
GMC Caballero 1978 - 1987 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Pontiac Bonneville 1982 - 1986 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Pontiac Grand Am 1978 - 1980 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Pontiac Grand LeMans 1978 - 1981 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Pontiac Grand Prix 1978 - 1987 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length
Pontiac LeMans 1978 - 1981 2" 4-Tube Full Length Header Chevelle Big Block Chevrolet 78-87 Metallic Ceramic Coating.
Full-length

Specifications:

Collector Attachment 3-Bolt Flange
Collector Diameter 3.5 IN
Collector Port Diameter 3.5 IN
Cylinder Head Port Shape SAP
Design Full-length
Flange Thickness 0.375 IN
Gasket Or Seal Included Yes
Gaskets Included Yes
Grade Type Performance
Header Style Full-length
Mounting Hardware Included Yes
Oxygen Sensor Port No
Part Type Exhaust Header
Port Shape Round
Primary Tube Outside Diameter 2.0 IN
Proposition 65 www.P65Warnings.ca.gov
Tube Wall Thickness 16 GU
Warranty Time 24 Months

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