Quote:
Originally Posted by Downfourit
I figured that when I looked at them and there may be where the problem lies, he had to either open them up on the machine or he welded in a reducer and that's why they are that far out. They were not meant for your car but you can always make something fit. Bottom line is you now have a 2.5" inlet tip on a 3" exhaust pipe and that is restriction no matter how you slice it. More back pressure, hotter temps, all bad for the cats and turbos.
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Hmm that doesn't sound like a great long term situation. I'd say really go ahead and put it back stock if you cannot find tips to do it the right way. Otherwise you risk maybe who knows a warranty claim later just for looks/aesthetics? If you want quad tips then I will say what a few others have alluded to...get a proper exhaust for the car. Its a $100k plus vehicle so really a $2500 exhaust is a drop in the bucket. If you want to get better sound then BMW does also offer a Performance Muffler set for the 650xi also. Go check on
www.getbmwparts.com website and check them out. I personally would do that versus trying to have an exhaust shop make a workaround fit on a set. Just my opinion.