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      09-06-2012, 02:55 AM   #23
Enlisted Member

Drives: 2007 335Xi
Join Date: Apr 2011
Location: Kenmore, WA

iTrader: (0)

So I ran into a problem last weekend. The nuts which connect the downpipes to the midpipe were amazingly rusted. It was so bad that despite soaking for hours in PB blaster both lower nuts stripped when I tried to remove them. I ended up having to cut the nuts with half the stud off. Next step is to get the remains of the stud out of the downpipe flange... And that seems to require downpipe removal. I found a nice looking DIY for that (specifically for the xi). Never a dull moment :/
2007 E90 335xi
Cobb AccessPort, BMW Performance Exhaust