2-Inch Long Tube Headers

The Doug's D318-SS headers are engineered to deliver maximum power gains across the entire RPM range, making them a preferred choice for racers and performance enthusiasts. Constructed from robust 304 stainless steel, these full-length long tube headers offer superior resistance to rust and corrosion without the need for coatings. The CNC mandrel-bent tubes ensure accurate fitment and optimal exhaust flow, while the precision-formed long transition collectors help reduce backpressure and boost high-RPM horsepower. The D318-SS features 2-inch primary tubes and a 3.5-inch collector diameter, with 3/8-inch thick machined flanges designed to prevent warping. The durable 16-gauge tubing ensures longevity, and the satin finish adds a performance-oriented aesthetic. Gaskets and mounting hardware are included for a more complete installation. These headers are designed for 1978-1987 GM G-Body vehicles equipped with Big Block Chevrolet (396-502) engines. They are also suitable for Big Block engine swaps into these vehicles. According to the manufacturer, these headers are legal for use on pre-emissions controlled vehicles and for closed-course competition use only. Users must certify their intended use, as they are not legal for street or off-highway use in California or in states requiring a California EO.