Chevy Impala Forums - View Single Post - Help with exhaust on 2012 Impala LTZ
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post #11 of (permalink) Old 04-20-2012 Thread Starter
JRScott8
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So I have already decided that I am going to scrap those 10s and I want either the 40 Series or the Super 44s now which one is better? Which one is louder? Will I get any better performance out of them?
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