Well other than learning that the spintech system is 150 times better than the stock system, I also learned that I need a right rear mid pipe section, seeing as how mine is cracked all the way along the seam. My shifter boot seal is indeed out of place and the reason behind all my road noise. The dealer never replaced the transmission tailshaft seal when they replaced the driveshaft. I need new exhaust hanger rubbers. I need new/better gaskets that go between the mid pipe flanges and the x pipe section. And I'm not at all fond of how the k&n cold air intake I picked up mounts, so much so that I put the stock airbox back in for now. I guess my winter list just got a lot bigger! But that spintech system... god, does it sound good! And what an easy install!