Well I put on my Magnaflow SI/DO and am not too happy (though the sound is great). Both the pipes that go over the rear dif. and axle don't want to fit. The passenger side pipe is facing towards the hitch and down, and if I try to twist the tube it hits the shock or the frame.

The whole system seems to be offset to the drivers side 4 inches too. It's a little frustrating and I plan on just having a shop look at it. Other then that it sounds great. I've traveled around 800 miles with it on and always surprises me with the deep note it makes when I start it up.

 

Blah, so I brought it into my friends dealership, and while they did fix it, it took them two days and $250 with a discount

The spare tire was the biggest issue and there had to be some cutting and bending for it to clear it. Oh well, lesson learned. For my next truck I will just have a shop order/install it.