CT Racing has uncorked the power that is available with the awesome YFZ450 motor. You can see from our dyno chart posted below that we have considerably more horsepower at every RPM split as compared to stock. The Sonic pipe is not a top end pipe. We really go after bottom and mid. What we have found through our R&D process is that we still end up with more peak horsepower than our competitors pipes, and the highest horsepower producing pipe on the market. This has been proven in three different Dirt Wheels Magazine pipe shootouts. Our kit is plug and play, complete with jetting and tips for air temp and altitude correction. We highly recommend the addition of the Pro Design Prow Flow filter system for maximum performance.