pureboiracer 0 Report post Posted March 5, 2011 Has anyone spent any time calculating/testing exhausts on a m20b25? proven results i would preffer, i can create enough "theory" myself. im running a fast street cam and wayneys headers, cheers oli Quote Share this post Link to post Share on other sites
kerry 10 Report post Posted March 5, 2011 with m20 i found that from the headers take 2 pipes and collect to 1 at the gear box x member, then run 1 2.5" to the back with 2 resonators 1 in the middle and one at the end, thats what i found to be the best. Quote Share this post Link to post Share on other sites
