Hybrid Racing Chain Tensioner is designed to be both stronger and more durable than the OEM Honda chain tensioner found on K Series motors. It is perfect for anyone who wants some added protection for their valuable motor. The tensioner functions exactly like the OEM unit it replaces while improving upon the flaws of Honda's design. The dual-ratchet design features hardened tool steel teeth that mesh with a heat treated chromoly piston. The teeth are crafted from the same material used for most the ratchets in high-end impact wrenches. The piston is designed to fit into the K series engine's timing chain guide tighter than the OEM unit does; this helps to avoid misalignment of the ratcheting mechanism and the premature wear that often occurs when aftermarket cams are used in conjunction with the OEM K Series chain tensioner. In addition, the internal oil passageways have been optimized to respond to oil pressure increase faster than the OEM unit; this becomes critical in motors that rev quickly and to high rpms.