<img src="/forums/images/graemlins/smile.gif" alt="" /> Ususally when them things get stopped up the tail pipe WHISTLES.. GM had a problem with the way they made the crossover pipes waaaay back in the 80's and the damn things CLOSED up under extended heat. Guys would start out for California with their new car and get bout maybe 500 miles before the thing started slowing down.. They would wind up doing 30 on the highway with the pedal on the floor..
You had bout the same problem with that cat.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />