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ULTRAZLS1 · 03-02-2010, 07:22 PM

Are you running 87 octane? if you are that could be the noise.

03-02-2010, 07:22 PM	#9
ULTRAZLS1 Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009 Location: Jackson, Michigan Posts: 4,418	Are you running 87 octane? if you are that could be the noise.