[JL8Jeff]

The Pacesetter y-pipe is either 2 or 3 pieces vs the TSP y-pipe which is either 4 or 5 pieces which may allow for more adjustment but also opens it up for more potential leaks. The other thing to consider if you plan to add dual cats is that the Pacesetter y-pipe has a couple of flattened sections and adding cats in those areas is a lot more difficult. You would want to get most of the joints welded up after making sure the fitment is good anyway. Just don't weld the y-pipe to the headers!