【Fits For】:RC 2Pcs RC Speed Up 35T Differential & 14T Main Gear Transmission Module Set Upgrades Part for 1/10 Bigrock 3S (ARA4312V3,ARA102723,ARA102711)/Granite 3S (ARA102720,ARA4302V3,ARA102666,ARA4202XV3,ARA4202V3,ARA4102V4,ARA4102SV4)/Senton 3S (ARA4303V4,ARA102721,ARA4303V3,ARA102668,ARA4203XV3,ARA4203V3,ARA4103V4,ARA4103SV4)/Vorteks 3S (ARA4305V4,ARA4305V3,ARA4105V4,ARA4105SV4)/Kraton 4S (ARA4408V2,ARA102690)/Outcast 4S (ARA4410V2,ARA102692) 1/8 Typhon 3S (ARA4306V4,ARA102696,ARA102722,ARA4306V3,ARA4206V3)/Vendetta 3S (ARA4319V3)/Infraction 3S (ARA4315V3,ARA4215V3). 【High quality material】: Differential Made of high-quality steel material, Hard anodic oxidation and anti-rust treatment on gear surface, long service life for these gears. 【More Durable】:The upgrades part is durable enough,improves the overall performance of the rc car.Specially designed strengthening cut-outs for increased crash resistance. 【Long-lasting Performance】: The rc car upgrades parts highly increase the strength and precision. 【Easy to Install】:great for replace the old or broken part.Increase overall performance and durability of your RC car.