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DrkPhx · 04-21-2015, 08:28 PM

You need to remove the crossover plugs from your stock heads and bolt them up.

04-21-2015, 08:28 PM	#3
DrkPhx Drives: 2013 Triple Black ZL1 / 2006 TB SS Join Date: Feb 2011 Location: MN Posts: 2,250	You need to remove the crossover plugs from your stock heads and bolt them up.