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Exhaust mellowing out?

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exhaust
855 views 3 replies 3 participants last post by  bbowman88 
#1 ·
I got the Roush AB a week ago, I've put 200 miles on it so far. Noticed today it seems less aggressive. This is my first aftermarket exhaust, is it normal for them to mellow out so fast? How much quieter can I expect it to get?
 
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