The exhaust manifolds found in the 1968-1979 Big Block Caddilac 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 Block Hugger off-road headers are designed to allow the exhaust gasses to flow more freely from each cylinder bank and combine in a more efficient manner. Block Hugger style headers are meant to be used where space for long tube headers isn’t available due to steering and cross member clearance issues. Tubing has been optimized for the 425, 472 and 500 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 material
TIG welded CNC machine flange
Metal gasket included
2 Piece 4-1 racng spec. 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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