That and my car makes so much racket. Ever hear a car with a solid roller cam? It sounds nasty and rather unmistakable. The smoothness of a OHC motor is about 180 degrees off of what I have. If you heard my car it would be like a toned down pro-stock car. That is about the closest description I can give. And if you screamed at me while we were rolling down the highway you would need a bullhorn for me to even hear you over my exhaust/sterio.