MAC 2-1/2" Pro-Chamber Off-Road H-Pipe for use with Shorty Headers on 2005-2010 Mustang GTs.This Pro-Chamber h-pipe goes even further than traditional h-pipes to produce more torque and horsepower by merging exhaust pulses in one area. Merging of all exhaust gasses creates higher temperatures which creates a boost in exhaust velocity, plus forcing exhaust gas to use both outlets. Made of stainless steel.
*Can also be used on the stock intake manifold.
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