I got my MRT midpipe installed last Thursday. It wasn't to bad of a job. I had no problems with the exhaust manifold bolts. I oiled everything up and let it sit overnight. I used my impact gun to remove the bolts. I had all 4 of thoses bolts off in 10 minutes. Ofcourse, the passenger side was a pain but they came out. I spent more time removing the bolts from my catback system. For the most part I followed MRT instrution. The instruction stated to "losely" assemble the "H" pipe and install it on the headers. I had trouble with that. I ended up taking it apart and installing one side at a time. I would have saved myself some time if I had done it that way to begin with. Once I got the 2 sides together, I used a robber mallot to "press" the 2 sides together. It took me less that 3 hrs to do the job. Now that I know some "shortcut", I could do this job quicker. It sounds great mated to my Magnaflow catback. Good thing about is no exhaust leaks at the headers! I can tell that it picked up a few ponies and I love the sound. This can be easily done in your driveway/garage. Just make sure you have enough clearence to get the pipes out from underneath the car. I highly recommend any type of midpipe install. The stock midpipe is very restrictive compared to any after market one. Pearl02.