That is a limiter! It's supposed to do that. It was designed for the idiots that rev their engines TOO high and blow them up! Ever seen a piston rod get 'slung'? It might NEVER come down from outter space. Most newer cars have that anyway. You don't need to rev beyond the limiter. Just be happy that you have it and don't do it that much. According to some people, "it's going to be funny when he sucks a valve."