Hybrid Racing K-Series Timing Chain TensionerDual ratchet design. Tighter tolerances than OEM Honda chain tensioner. More durable than OEM unit. A must have if your using aftermarket cams and valve springs. Description Vehicle Fitment Despite being a fairly robust motor, k series engines have been found to have weak timing chain tensioners that fall victim to excessive wear when aftermarket cams are installed in the motor (and in some instances with stock cams). The fast ramp rate of aftermarket