Doug's Headers D741-B 1 3/4" 4-Tube Full Length Header Olsmobile Cutlass 455 65-75 Hi-Temp Black Coating

Features & Benefits 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 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.For the enthusiast who demands the best, Doug's Headers are not just components; they're a statement of excellence, a commitment to leading-edge performance, and a nod to the glory days of muscle cars and drag racing. Join the ranks of champions. Experience the unmatched quality and performance of Doug's Headers today.Specifications Finish Hi-Temp Black Coating Material Steel Design Full-length Primary Tubing Diameter 1.75 IN Collector Port Diameter 3.0 IN Port Shape SAP Tube Wall Thickness 16 Gauge Flange Thickness 0.375 IN Collector Attachment 3-Bolt Flange EGT Port No Oxygen Sensor Port No Gasket Or Seal Included Yes Mounting Hardware Included Yes Color Black Sheen Level Matte