BMW M3 Forum (E90 E92) - View Single Post - ♦ Sonic MS | Race Precision (RPi) GTM Exhaust System for the E92 M3

inagua · 07-20-2011, 12:01 AM

love the sound of the GTM cat back system but the HP gains of the full race system. Dont want to "tune" out the CEL.
Any idea of the HP gains with just the cat back system.

07-20-2011, 12:01 AM	#32
inagua Lieutenant 17 Rep 433 Posts Drives: F82 M4, X5 35d, m235 Join Date: Feb 2009 Location: Thousand Oaks, CA iTrader: (1)	exhaust love the sound of the GTM cat back system but the HP gains of the full race system. Dont want to "tune" out the CEL. Any idea of the HP gains with just the cat back system.
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