Reviewed By Kai S (ARVADA, CO) Reviewed for a 2004 Ford F-150 —7/27/2015 9:41 PM
Upgraded from a single outlet Super 40 muffler and I can tell you the dual system sounds much better. It's not overbearingly loud but still has a great rumble. MPG gains are very slight but throttle response is definitely improved. I would recommend getting 3.5 or 4 inch tips though...the 3x12 ones included with this system are a little small at least for my taste.