Phathead Racing is proud to offer high quality CNC machined from billet, performance 2-stroke heads at the very best prices. We offer a complete line of high performance heads for all the popular 2-Stroke motorcycles and Yamaha Banshees. These heads increase cooling, horsepower, and allow you to modify your power band by changing compression ratios. If you choose to run race fuel, 105+ octane, our higher compression combustion chambers will deliver an amazing amount of low and mid range horsepower. Our interchangeable combustion chambers are easy to modify and economical to replace making custom modifications inexpensive to try. We have a complete inventory of Wiseco pistons to fit big bore and flat top conversion kits.

Phathead Racing no longer provides big bore kit modifications, machine shop services, or tuning recommendations. We are a manufacturer and retailer for our performance 2-stroke motorcycle cylinder heads and replacement parts. For assistance with tuning issues contact your local shop or experienced motor builders.