Just purchased stromung catback exhaust today. I bought my car months ago and have not done anything major to it. So I am getting my Bilstein HD and new M3 LCAB installed at the same time with the exhaust. 3 questions. Should I buy all new hangers for my exhaust? When I bought the car he put 2 new ball joints to pass safety but I think they were NAPA brand, should I change them or will these last awhile? I don't race. My mechanic told me 4 hours for the HD install, 3 hours for my bushings and .8h for the exhaust. He told me $400CAN if I want to to it cash. Does this sound like a decent price? Sorry for all the question.
I went onto bimmerforums and all they do is talk crap about my TI
Stromung Exhaust 
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