2004-2005 Speedwerx 800SX Conversion to 600SX Mod Motor Billet Head Kit

We’ve been designing and machining cylinder heads for years now and we don’t just cut (.020”) here or there, we actually redesign the dome and/or pocket itself. We run different squish angles, pocket radius’ and squish bands on most models. Along with our highly skilled and experienced development team, we also utilize our state of the art machine shop to manufacture precision parts so you can sleep good at night knowing you will be getting the best out of your machine in all riding conditions!