Magnaflow or flowmaster?
#11
it's the resonator which cuts down on the exhaust drone in the cabin. the magnaflow one is 14" where the stocker is 18" long. michael says it gives a much better sound compared to the stock one. i'm going to have to go with this option some time down the road, but maybe after the holiday season
The Magnaflow resonator is a glass pack design, and the stock one had loovers, and channels in it (at least thats what the exhaust shop told me). Plus like Drew said, the stock is an 18", and the magnaflow one I got was a 14", you could go even smaller if wanted, all depends on how loud you want it. I personally did not want a lot of cabin noise when cruising on the highway.
#19
LOL, yup, all that power at WOT just blew a hole through the resonator!