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BigKriss
05-28-2009, 03:20 AM
all legalities aside, I am thinking of removing the cat since it's off the car and getting an exhaust business to put two mandrel bent pipes in. So what size piping, I was guessing 2.25", do you guys think this size is appropriate and why?

http://img39.imageshack.us/img39/8696/535exhaust.jpg
bimmerred535i
05-28-2009, 09:20 PM
all legalities aside, I am thinking of removing the cat since it's off the car and getting an exhaust business to put two mandrel bent pipes in. So what size piping, I was guessing 2.25", do you guys think this size is appropriate and why?

http://img39.imageshack.us/img39/8696/535exhaust.jpg

I am interested to see if anyone has an answer for you, but I saw this on ebay and thought it was a cool idea.

http://cgi.ebay.com/BMW-High-Flow-Cat-Converter-FOR-e28-e30-e34-e46-Exhaust_W0QQitemZ300317140399QQcmdZViewItemQQptZAU _Car_Parts_Accessories?hash=item45ec4be5af&_trksid=p3286.c0.m14&_trkparms=72%3A1171%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50