This is one of my first posts. I have had a 2012 Dodge Ram Sport 1500 for over a year and a half...just 13K on the clock. Got a unmarried Diablo DCX yesterday...installed 91 tune, disabled MDS, rev and speed limiter. With the exhaust (flowmaster 40, Varraram Intake and catch can. Man what a difference. Had to return it to stock to take to dealer...the smog pump and CATS need replaced now. Makes a high pitched squeal when it runs and shut it off. But man what a dog without the tune.