well, i did have an exhaust leak before i put the manifold on, and i did the tomei turbo elbow/outlet as well. so my experience probably won't be the best to go by. BUT, i noticed a HUGE difference from before/after. one of my friends has an sr with stock mani/elbow and he said there is quite a bit of difference. it is designed for quick spool, not top end power, but with a 2871 and supporting mods, there should be no problem getting close to the 400whp mark. i'll know in the next couple months.
