TODA RACING PISTON KIT FOR HONDA B16B - 81.5MM BORETODA Racing high compression forged piston kits come complete with forged pistons, piston rings, C clips, and heavy duty wrist pins. The basic form of the piston is an elliptical barrel. This forms the basis from which each part is subjected to high loads and measured for thermal expansion to accuracy of 1 1000(mm). The top edge of the piston uses a castellation design to reduce sticking, improve lubrication and sealing. The design also acts as a