This differential kit comes with an upgraded pinion bearing. This bearing and seal kit works on the following models
1987-2002 4X4 Suzuki 250 Quadrunner
1991-2002 4X4 Suzuki 300 KING QUAD
1987-2002 4X4 Suzuki 250 Quadrunner
1991-2002 4X4 Suzuki 300 KING QUAD