This Schumacher Racing Products factory replacement 20-tooth side gear is designed for the CAT L1 EVO platform. It fits into the gearbox differential assembly and is a direct drop-in replacement for worn or damaged originals. The gear features a splined center bore for secure shaft engagement. Features: 20-tooth side gear Splined center bore Fits CAT L1 EVO gearbox differential 7/7/26 cs