This combo performed exactly as stated, it gave a clean crisp throttle response, and excellent pull through the mid and into the top. This thing pulls so much better through the mid range that it has transformed our starts. If we aren't getting the hole shot, we are fighting for it. The only reason I didn't give 5 stars is the pipe is too thin, gets dents very easy. Ours didn't make it through one weekend of racing before denting up. I don't believe we have lost any performance from the dents, but just saying.