EVO 8 & 9 OEM Transfer Case Ring and Pinion gears!
These are brand NEW factory ring and pinions for the Mitsubishi EVO 8-9.
While it may not necessarily be required, we highly recommend installing new seals and bearing.
WPC is a permanent surface treatment that reduces friction while strengthening the part. Its unique micro-dimple formation pattern greatly reduces friction and is unmatched by conventional methods of surface treatment. It is a proven process that has been utilized for many years in the racing and automotive industry and is complimented by using our Micropolish treatment. WPC can strengthen parts in two ways. First it adds an extremely high level of compressive stress at, and near, the surface. The second, is that the WPC treatment creates a Nano - Crystalline structure at the surface of the metal. Both of these mean that metal fatigue and crack initiation are both noticeably reduced; thus strengthening the gear and shaft.
Micropolishing is a gentle polish on the gears done by machine that will smooth and remove some stress concentrations uniformly. It also polishes the gears in the area they make contact with other parts, so you have less friction loss which means less heat, better fuel economy, and longer life. This will not make your gears stronger, but with less friction there is less stress so you might see longer life from a gear after going through this process.
Tags: EVO Parts