After 3 years with the Flowmasters on my 07 I replaced them yesterday with a Magnaflow system with resonators. 100% improvement in the sound. The Flowmaster system that was on when I bought the car was a mess. 2 3/4" necked down to 2 1/2" back up to 2 3/4" then back down to 2 1/2'' back to the crome tips. Nasty drone at low speeds but it sounded nice under throttle and full bore. The Magnaflows sound nicer all around, from idle on up.