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Adjustable compression


Let Cooler Heads prevail... Pro Design Cool Heads is one of the most popular engine mod­ifications seen on the pro racing cir­cuit. Cham­pionship motocross and TT riders Gary Denton, Tim Farr, Doug Gust, and Shane Hitt, as well as cross-country aces Barry Hawk, Chad Du­vall, and Banshee-mounted Kim Kuhn­le, have all won races using the Pro-Design Cool Head. Top ATV en­gine tuners, such as Curtis Sparks Rac­ing, LRD Performance, CT Racing, KT Performance, Port Magic, Nac’s Racing, and many others add the…