I was pleasantly surprised at tone and power
I put the pro series muffler on 2006 dodge 2500 cummins diesel pickup that has a 5in exhaust from the turbo back. (( the cat has been removed)) previous muffler had way to much drone in the cab it was very bad. Placed an order with auto anything had my muffler in 3 day had it put on and Boom , No Drone Quite cab and great power I mean power you can feel through out the power band IMy truck make about 450Hp and I love this pro series muffler
I was excited about installing this muffler and expected it to be real quiet better than the origional equipment well not so I still needed the resinators. I wish I was told I would need something to keep the drone noise out of the cabin. There are a lot of V/^ engines out there and more testing should be done to eliminate the drone noise and still have better flow.