DDM HPI BAJA 27 + 29CC PISTON, RING PISTON PIN & BEARING SETChung Yang high performance 35mm piston kit. Piston has proper cam and taper for better fit in bore at operating temperatures, resulting in longer life and better ring seal. Improved skirt cutout for increased transfer port flow. Ring is made from nodular iron for durability and longevity. Kit includes piston, ring, piston pin, circlips, pin bearing, and washers. Fits CY27RC / CY29RC engines and engines with 35mm big-bore kits or headkits.