Full-Length Headers w/ 1.75" Primary, 3" Collector

The Doug's Headers D570-B is a performance-oriented, full-length header engineered for 1970-1979 Pontiac Firebird V8 models equipped with D-Port cylinder heads. This header aims to provide significant increases in horsepower and torque across the entire RPM range, making it a choice for those seeking maximum power. Constructed from robust 16-gauge steel, the D570-B features CNC mandrel-bent tubes for precise fitment and optimized exhaust flow. It boasts 3/8-inch thick machined flanges designed to resist warping, ensuring a secure seal. The primary tubing diameter is 1.75 inches, with a 3-inch collector port diameter, and a D-port shape specifically for compatible cylinder heads. Finished with a durable Hi-Temp Black Coating, this header offers a matte black appearance that provides reliable protection against rust and corrosion without the added cost of specialty coatings. Included with the header are premium extra-thick gaskets and all necessary mounting hardware for a complete installation. Fitment is specifically for Pontiac Firebird models from 1970-1979 with V8 engines and D-Port heads. Additional notes indicate that the installation may require removal or modification of locking steering columns. Some factory heads may need to be drilled and tapped for proper sealing. The header is confirmed to fit with specific Milodon oil pans (30355, 31660, & 31665). This product is considered legal for use on pre-emissions controlled vehicles and for closed-course competition use only.