I had a 92' Non-Turbo.. got it to 158 at red line for a few short seconds on a hiway going from Dallas to Shreveport. The only mod I made was a Stillen Hi-Flow unrestriced air intake with a K&N Airfilter. How did I know it was 158.... I saw it on the radar as *58 when I was arrested and taken to jail :( It's okay... 1 day in jail, my wallet a thousand dollars lighter, and a mad FREE lawyer (friend) and I was on my way with it not going on my record. Bad thing is that it floded in oklahoma city in the summer while I was in a club and the street lowered into a valley like place... I couldn't see very well because of the rain and well the air filter went under water..... buh-bye engine :( Buying a 90 2+2 T-Tops and leather in a day or two....