Just installed a magnaflow catback system on my DBL Cab. Seems to be a bit too loud at certain RPM's creating a "droning" sort of noise that is quite annoying in the cab. Fine under hard acceleration. Fine when cruising, where it is no louder than stock. Just seems to be a problem under average city driving acceleration.
1. Does this muffler "break in" at all such that the sound gets any quieter or more mellow?
(It doesn't make sense to me, but read in a few posts that some exhausts break in.)
2. Is there another muffler that offers similar performance gains while being quieter than the magnaflow?
3. Does anyone have dyno results showing what kind of HP/ torque gain/loss occurs for just the magnaflow catback system?