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Can someone with a stock vx please crawl under the car and give me a pipe diameter? or circumference if thats easier for u... the vx I bought recently has an aftermarket pipe from the exhaust manifold/cat. then it has a 2007 SI muffler added. and yes i have googled and tried to look up replacement parts for the sizing but they dont give me all that info wherever i find parts.
I've read all the stuff about less back pressure at higher RPMs. I plan on maintening those lower RPMs for lean burn and FE. Seems to me trading it off for a stock would be the thing to do??? I'm confused lol
I still don't have enough info for the pipe calculator. Dont know where to find valve opening BTDC or closing ATDC or duration...
Thanks!
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Last edited by SiVX; 04-13-2012 at 02:37 AM..
Reason: forgot part
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