The exhaust manifolds found in the 1970-1981 Chevrolet Pontiac Buick and Oldsmobile engines were designed to combine the exhaust gasses from each of the cylinders quickly with a manifold that was cost effective to produce. Our 4-1 Long Tube Style off-road headers are designed to allow the exhaust gasses to flow more freely from each 4 cylinder bank and combine in a more efficient manner. Tubing has been optimized for the Small Block 302/305/307350/400 cubic inch engines. This creates a reduction in cylinder backpressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound.
Made of high quality T-304 stainless steel with computerized mandrel-bends for strength and durabilityi.e. Maximizing smoothest high exhaust air flow rateTIG welded CNC machine flange2-Piece 4-1 Racing design(8-2-1)Increase high flow air, instantly gain 10 to 15 Hp. / Tq.
Includes:
1 x Header exhaust system
All necessary installation hardware
Notes:
Fits Chevy small block V8 engine
Will fit straight or angle plug heads
100% Brand New
Professional Installation is Highly Recommended
Installation Instruction is NOT Included
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