Hot Racing aluminum gearbox case With HD out put bearing for the front or rear of the 1/8 BLX Arrma Kraton, Notorious, Outcast, Senton, Talion, and Typhon. See vehicle model compatibility in comments below. FEATURES: - Stronger and and stiffer assembly- Upgrades the stock 5x11x4mm unsealed outer pinion bearing with an oversized 5x13x4mm sealed bearing for a stiffer and stronger drive train- CNC machined aluminum construction- Anodized black with machine chamfered edges- Fits both the front or rear- Direct fit hop up requires no modification for use YOU WILL RECEIVE: - One (1) gear box case main body- One (1) 5x13x4mm black rubber sealed ball bearing- Hardware REQUIREMENTS: - All other parts besides the lower gearbox case, including the stock 8x19x6mm inner pinion bearing- Assembly and installation per vehicle manual- Medium thread lock (blue threadlocking compound) on screws