hey you seem to be pretty knowlegdeable about the z32's i have an issue,I have 1990 n/a and the other day I was driving home in the rain and lost traction and spun out ,I didn;t hit anything but now my engine sounds horrible it''s got a knock in the rear top end and from a dead stop i have to leave the clutch in up to 3 grand to move. and once going I lose hp at 5000rpm and i can't redline in neutral. my exhaust smell like rotten egg and is really hot. one person where i live said it sounds like i knocked a rocker loose and that my cat feel like there resticted since he says the pressure off the tips is so fate even when reving the engine. what do you think