Innovative design is both durable and very strong Shipped with CNC-machined billet aluminum top cover Output main shaft support bearing that minimizes flexing of the main shaft Built-in oil pump for lubrication of the output main shaft bearing Polished case Includes hydraulic clutch All parts are made in the U.S.A. and assembled in JIMS technologically advanced facility Transmission is not compatible with stock chassis and modifications will be necessary. For '90-'99 RSD Evolution-style Softail applications.. TRANS,RSD 6SP HYD POL