Well, After tow months of sitting in a box and collecting Dust, I finally got around to putting my 4" Jardine system on. The hangers lined up great. I put the muffler (magnaflow) on loosely, dropped the truck down and fired up. reved the thing four times, then put it back in the air and proceeded to remove the muffler and use straight pipe instead. The straight pipe is definitly louder than the 3 " on the bottom, but has much more base to it. The turbo sounds like it is at the rear of the vehicle now. . Perfect sound!!!