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Doug's Headers 1970-79 Pontiac Firebird V8 Round Port Heads 1 7/8" Long Tube Header D581

Doug's Headers 1970-79 Pontiac Firebird V8 Round Port Heads 1 7/8" Long Tube Header D581
Doug's Headers 1970-79 Pontiac Firebird V8 Round Port Heads 1 7/8" Long Tube Header D581Doug's Headers 1970-79 Pontiac Firebird V8 Round Port Heads 1 7/8" Long Tube Header D581
from $1,853.48 st

Available Options

*
Model: 5124758
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
D581.pdf368.81KB
D581-B.pdf368.81KB

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
Pontiac Firebird 1970 5.7L / 350 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1971 5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Legal for use on 71-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-76 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1972 5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Legal for use on 71-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-76 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1973 5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Legal for use on 71-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-76 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1974 5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Legal for use on 71-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-76 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1975 5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Legal for use on 71-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-76 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1976 5.7L / 350 / V8
7.5L / 455 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Legal for use on 71-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-76 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1977 5.7L / 350 / V8
6.6L / 403 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Not Legal for use on 77-79 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1978 5.7L / 350 / V8
6.6L / 403 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Not Legal for use on 77-79 Firebird Emission Vehicles in 50 States
Pontiac Firebird 1979 5.7L / 350 / V8
6.6L / 403 / V8
6.6L / 400 / V8		 Requires removal or modification of locking steering columns if equipped.
Fits Edelbrock Performer RPM, RAM-Air, Super Duty and H.O. Round Port Heads only
Header will fit with Milodon oil pans 30355, 31660 & 31665
Full-length
with Floor Shifter
Legal for use on 70-74 Firebird Emission Vehicles in 50 States
Not Legal for use on 75-79 Firebird Emission Vehicles in 50 States
Not Legal for use on 77-79 Firebird Emission Vehicles in 50 States

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 1.875 IN
Proposition 65 www.P65Warnings.ca.gov
Tube Wall Thickness 16 GU
Warranty Time 24 Months

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