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      12-07-2012, 12:37 PM   #24
nerwyll@trinityautosport
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Drives: Jet Black e92 M3
Join Date: Apr 2012
Location: Orange County, CA

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very little change in smell in my opinion if there is any noticed. Ive had my Macht Schnell pipes for a while now on my car and have had no leaks. power increase of about 24 hp to the wheels in midrange and about 20whp on top end. smog I dont worry about I can always put the cats back on, or Ill borrow my boss's x-pipe for when the time comes. as for warranty issues, there have been none when I go to the dealer. Im sure if I complain about anything with the exhaust or O2 sensors there, it wont be covered, but everything else still is.