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?
That's about as mellow as it's going to get. I have the same exhaust and I think around 100 miles it mellowed out for me. I've had them for about 1,000 miles now and they haven't mellowed out since then.