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cyberLS · 04-26-2011, 12:15 PM

From what i remember if you go with the GM performance exhaust it is not much of a gain in hp but it will sound different, but it is over priced the best to to go after market you can get a cat back for the price of their axle back.

04-26-2011, 12:15 PM	#9
cyberLS Drives: 2010 Cyber Grey LS Join Date: Mar 2010 Location: Santa Clara Posts: 2,224 View My Garage	From what i remember if you go with the GM performance exhaust it is not much of a gain in hp but it will sound different, but it is over priced the best to to go after market you can get a cat back for the price of their axle back.