Quote Originally Posted by peteyturbo View Post
The outlet of the muffler is larger then 2.5" .. This is exactly why I decided against a magnaflow exhaust which is 2.5, no sense of installing a 2.5 exhaust when you will be adding restriction.. FYI MBRP exhaust is a full 3 inch system..
Yeah maybe a hair larger but its still considered a 2.5". If he is looking to replace just the muffler he wants a 2.5 inch offset in center out (make sure you have it welded in).

My friend has the MBRP 3 inch exhaust on his 06 5.7 liter Commander. It sounded like crap so he swapped out mufflers with a stainless steel flowmater 2 chamber muffler (Cant remember off hand which series). It's sounds amazing now.