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flinchy · 06-21-2012, 06:56 PM

Performance muffler is good for maybe 1-3hp, it's still fairly restrictive. Just makes noise bleh. A full cat back or cat back with 2nd cat del would be easy 10-15hp, headers cat del would be the same

06-21-2012, 06:56 PM	#71
flinchy Brigadier General 126 Rep 3,099 Posts Drives: E82 135i Join Date: Nov 2011 Location: QLD, Australia iTrader: (0)	Performance muffler is good for maybe 1-3hp, it's still fairly restrictive. Just makes noise bleh. A full cat back or cat back with 2nd cat del would be easy 10-15hp, headers cat del would be the same
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