I was just going to say that about my headwork. The compression is minimally raised if any. My car runs noticably better on the quarter mile because that is how it is tuned. You can get internals all day but if they are not tuned then all the expensive parts aren't working in sink. My setup is built basically for quick quarter mile runs. As for the highway or top end, my car is still topping off at around 120-128. Decide whether you want to be top end killer or quarter mile screamer. It's all up to you. Just make sure you ask a lot of questions, get the right parts for how mild or wild you wanna be or run, and get the car tuned by a reputable shop. Pay the money and put it on the dyno. You'll be glad that you did.