How many times have you bumped the rev-limiter on your I-4 manual trans? 4 times so far for me. The rev limiter seems to kick in right around 6700 rpm. When accelerating quickly in 1st gear it is easy to hit the limiter if you're not looking at the tach, especially since this engine is so smooth and keeps pulling all the way to and through redline. I have been surprised every time I hit the limiter since the car was still accelerating nicely and I didn't pick up on any nasty vibes, harmonics, or change in engine demeanor that would have otherwise told me to shift. In my past vehicles, a good computer tune moved the rev limiter up 500 rpm from stock and I think this car could handle a 7000 rpm limit but I don't want to chance any valve to piston contact...that could be bad, mmmkay.