Many Mustang owners want more performance from their pushrod 5.0L, 5.8L, 3.8L, or mod motor 4.6L or 5.4L Mustang exhaust. The H pipe or mid pipe is a good way to free up additional power by creating better exhaust flow on your Mustang. This 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Mustang H-pipe is off road which means it comes without catlytic converters for more power and better exhaust flow than your stock or factory Mustang catalytic H-pipe. Since this Mustang H pipe is for off road or race use only, it is illegal to drive on the street and may not pass inspection. Bolt on designs and most are made from Stainless steel for long lasting performance and that great Mustang rumble!
Since Mustang V8's fire unevenly, the exhaust exits in pulses rather than a steady flow. While one pipe is filled with pressure the other pipe is relatively pressure-less. By connecting the two pipes in a siamese pattern, pressure is allowed to be released to the other side. This action allows the exhaust to pass through the pipe quicker and this better 'breathing' results in increased horsepower for your Mustang.
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