01-05 Honda Civic Ex 1.7L D17A2 4 Cyl Stainless Racing Manifold Header Exhaust

This exhaust manifold for the 2001-2005 Honda Civic D17 SOHC VTEC 4 Cylinder Engine 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 off-road racing headers are designed to allow the exhaust gasses to flow more freely from each cylinder and combine in a more efficient manner. Tubing has been optimized for the 1.7L 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.