MAC 2-1/2" Off-Road Pro-Chamber H-Pipe for 1999-2004 2V and 4V Mustangs Equipped with Long Tube Headers.MAC Pro-Chamber off-road H-pipes produce more torque and horsepower by merging all exhaust pulses in one area, eliminating the catalytic converters. Creates higher temperatures which creates a boost in exhaust velocity. This aluminized steel H-pipe is uncoated.
*For use with MAC long tube headers.
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