T.M. Designworks Rear Chain Guide & Dual Powerlip Roller - Yamaha Blue RCG-002-BU Molded 1-piece indestructible plastic housing uses a set of TMDs Patented Powerlip rollers for the chain to run on Bolts on without removing the chain and transfers 100% HP to rear wheel. Eliminates flat spotting the chain plates 1-year manufacturers free replacement warranty on housing. 90 days on the Powerlip rollers