Is 1:38s good time for e9x m3? I dont know because i have not tracked my 09 m3 yet. But my best lap time with 135i on thunderbolt this summer was 1:34.18. The engine is stock for now(afraid to tune it because of overheating issues). The suspension is modded with r-comp. tires. It will be interesting to see what time can i get with stock m3. My track money goes to 135i right now, but i may get just wheel/r-comp. tire combo and track pads for m3 and track it a couple of times next year. We"ll see