Stock rebuild kits use the OEM spec parts that your turbo came with from the factory. Our High Performance rebuild kits include a heavy duty 360° thrust bearing and a step gap piston ring that will increase the durability and longevity of your turbo.
For an overview of the different seal types in T3, T4, & T3/T4 kits, CLICK HERE. For T2, T25, & T28 kits, CLICK HERE.