1970-1974 Pontiac Firebird/Trans Am, 1964-1974 GTO/Le Mans/Grand Am: 350-455, Tube Size 1.625″ O.D. x 28″, Collector Size 3″ O.D., Collector Length 8″, Port Shape: Same As Port

Part Number: 4901-1HKR

Hooker Competition headers offer the best value in the high performance header market. Designed for the value-conscious buyer, 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″ 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