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Doug's Headers 1968-73 Chevy Chevelle/El Camino Big Block without A/C 2 1/8" Long Tube Header D331

Doug's Headers 1968-73 Chevy Chevelle/El Camino Big Block without A/C 2 1/8" Long Tube Header D331
Doug's Headers 1968-73 Chevy Chevelle/El Camino Big Block without A/C 2 1/8" Long Tube Header D331
from $1,893.89 st

Available Options

*
Model: 5124722
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.
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
D331.pdf228.83KB

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 Chevelle 1968 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet Chevelle 1969 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet Chevelle 1970 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet Chevelle 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet Chevelle 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet El Camino 1968 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet El Camino 1969 6.5L / 396 / V8 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet El Camino 1970 7.4L / 454 / V8
6.6L / 402 / V8
6.5L / 396 / V8		 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet El Camino 1971 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet El Camino 1972 7.4L / 454 / V8
6.6L / 402 / V8		 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning
Chevrolet El Camino 1973 7.4L / 454 / V8 Big block frame stands and motor mounts required for proper fit.
One tube on each side goes over the frame.
Full-length
without Air Conditioning

Specifications:

Collector Attachment 3-Bolt Flange
Collector Diameter 3.5 IN
Collector Port Diameter 3.5 IN
Cylinder Head Port Shape Round
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 2.125 IN
Proposition 65 www.P65Warnings.ca.gov
Tube Wall Thickness 16 GU
Warranty Time 24 Months

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