Long Tube Headers for 70-81 GM F Body 75-79 X Body 265-400 SBC D326-B charging-and-starting-systems Power output is adjustable from

Power output is adjustable from 190-300 horsepower simply by changing fuel and nitrous jets

7L V8 1985 Chevrolet C30 Scottsdale 379/6

Mercury Bobcat (1975-1976)

3/8" fuel line hose 6" long

Mazda RX-7 (1986)

Long Tube Headers for 70-81 GM F Body 75-79 X Body 265-400 SBC D326-B charging-and-starting-systems Power output is adjustable fromOverview: 70 81 GM F 75 79 X Body SBC Long Tube Black Coat 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