put your original housings and wastegates on them. You'll save a bunch of $$$ (I don't know how much a bunch is). However, I can vouch for the newness and quality of member Scotts94z32's sport 500 turbos. If I was looking for new turbos, I'd be all over them. Take a look at his dyno sheet. But if you are sold on getting new stockers, go the new center section route. Rebuilding them (putting in new bearings...essentially rebuilding the center section) is dicey and will cost about the same as getting new bearing housings and wheels (CHRAs). Good luck, Mark