I just put a Flowmaster 40 series on my Magnum, and its LOUD! Very LOUD! I love it. I used to be known as the guy in town that had the loudest exhaust, two cars back. I basically had my Ractive exhaust with no Cat, No Res, just one long pipe. 5th gear still make my butt rumble in the seat and could be heard plain as day

Now with the Flowmaster, I'm not the loudest but up there!!