I added an offroad (3 inch) h-pipe and long tubes to my car after I had installed the Mac 3 inch catback system. There was a huge difference in performance and sound over the stock headers and h pipe.
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-1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway
-1994 Ranger w/ 427cid windsor (daily beater)
check it out!
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