The exhaust manifolds found in the 2005-2006 Pontiac GTO 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 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 LS2 6.0L engine. 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 material
TIG welded CNC machine flange
O2 sensor bung insertion; Metal gasket included
2-Piece 4-1 Racing design(8-2-1)
Increase high flow air, instantly gain 10 to 15 Hp. / Tq.
Includes:
1 x Set of exhaust header
All necessary hardware, bolts, and gaskets
Notes:
100% Brand New
Professional Installation is Highly Recommended
Installation Instruction is NOT Included
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