First of all, don't bother trying to un-bolt the bolts that connect the u-bend to the flange on the cat-back. I cut them with a saws-all. As far as the other 2 bolts on the manifold side, i soaked mine in wd-40 and let it sit for 20 minutes. Then hit it again with w-d. Then i made sure i had the right size socket and a breaker bar. I then set the socket and breaker-bar on the bolt, wedged miself out from under the car, and used my leg and foot on the breaker-bar, and got them loose. Work smarter, not harder
