The exhaust manifold found on 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. / This item fits: Honda civic ex 1.7l d17a2 (2001-05).
The exhaust manifold found on 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...
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