Compatible with 70-74 Pontiac Firebird/Trans Am, 64-74 GTO/Le Mans/Grand Am: 350-455, Tube Size 1.625 in. O.D. x 28 in., Collector Size 3 in. O.D., Collector Length 8 in., Port Shape: Same As Port; Hooker Competition headers offer the best value in the high performance header market. Designed for the value-conscious buyer who is running either a stock or mildly-modified engine, Hooker Competition headers offer premium features at a very competitive price. Made of durable 16 gauge mild steel tubing, the Hooker Competition header design utilizes a long transition collector to reduce back pressure and increase exhaust flow. A perfect sealing surface is assured with the 5/16 in. machined flanges, with welded O-ring seals. Experience has proven that this flange size is ideal to maintain header integrity and be pliable enough to seal each exhaust port. Tubing is mandrel-bent to maintain metal strength and provide consistent tube diameter at radii to maximize performance. Hooker Competition headers have a standard finish that features a heat-cured, high-heat-resistant paint. Optionally, the famous Hooker Ceramic Thermal Barrier Coating is available.;
Tuned-length primary tubes for street performance Mandrel-bent tubing for smooth exhaust flow Light weight & sturdy 16 gauge tubing Long transition collector for decreased back pressure 5/16†machined flanges for a perfect seal Industry’s best welds for durability designed for easy, trouble-free fit All necessary hardware included for a complete installation
