Modded Mustang Forums banner
1 - 1 of 17 Posts

· Registered
1,813 Posts
the prochamber is giving you the back pressure you need... but if your runiing a off road h pipe then your losing a little up top and helping down low.. its the opposite with the x pipe
1 - 1 of 17 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.