with my current stage. I do recall though when I was looking at purchase of my last Z driving a bone stock 91TT. Wow, did it feel like a dog. I swore to the owner that the turbos must have been bad or bad leaks all over or engine had compression < 90. Took it to a Z guy and he said it checkout good. It sure would be tough going back to stock once you hit about stage III and drive it for a long time. Now I feel just what a dog a 350 must feel like.