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Old 09-21-2012, 04:33 PM
7 series guy 7 series guy is offline
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Location: Los Angeles
Join Date: Apr 2012
Posts: 32
Mein Auto: 2000 740I sport

similar system mine uses knock off remus muffler with quad tips sounds real sick will make a you tube to post
Originally Posted by skinchin13 View Post
Hey for the 750il this is what i did. There was some hp gain which was proven by dynometer runs. I has an x-pipe going to flowmaster super 10s, and the pipe size is 2 1/4.
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