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Old 09-09-2018, 07:38 AM   #7
91 zeee
Drives: 2014 SS
Join Date: Dec 2016
Location: richmond
Posts: 47
Zz430 is exactly right. Also they do make kits to make the valves active, but, I agree, no need. It sounds great with the valves open.
When you take the rear diffuser off make sure you put tape on the painted surfaces of the bumper to protect it fro. Your pry tool (plastic trim pry tool is best).
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