Each piston is forged from 2618-T6 aluminum to ensure maximum strength, durability and performance under extreme applications. Each piston has been developed, tested and raced by championship winning professionals, enabling CP Pistons to offer the best available part on the market while exceeding your expectations. Full radius crown designs maximize quench while eliminating hot spots. CPKX Kits feature CPs latest Project X technology which incorporates a fully boxed style piston which ensures a high strength, lightweight assembly. CPKX Kits also includes a DLC pin.This technology has been proven and used in the highest forms of motorsports because of its high resistance to abrasive wear, which extends the service life and reliability under extreme conditions. CPKX Kits include a Project X piston (coated), DLC pin, circlips, rings and Cometic top end gasket kit. Made in USA.This item fits the following vehicle applications:compatible with Honda CRF250R 2004-2008