CSOhara WPC plus Tin Treated Final Gear is available in 3.9, 4.1, 4.3, or 4.44. This gear set has undergone advanced WPC treatment to enhance durability, coupled with the additional benefit of tin shot treatment for increased surface strength.

CSOhara Solid Pinion Distance Collar stabilises of Pinion Bearing Preload. It replaces the stock pinion crushable collar of the final gear to ensure rigidity and prevent pinion oscillations. It effectively combats poor tooth contact resulting from heat damage and loss of bearing preload torque under heavy loads.