【Compatible with】:The RC upgrades part 1/10 Senton 3S BLX(Mega 550).Bigrock 4X4 3S BLX,Granite 3S BLX(Mega 550),Vorteks 3S BLX.1/10 Kraton 4S BLX,Outcast 4S BLX.1/8 Infraction 3S BLX(Mega),Typhon 3S BLX,Typhon 4WD V3 Mega 550,Vendetta 4WD 3S BLX. Car model:ARA4312V3,ARA102723,ARA102711,ARA102666,ARA102720,ARA4202V3,ARA4102V4,ARA4102SV4,ARA4202XV3,ARA4302V3,ARA102690,ARA4408V2,ARA102692,ARA4410V2,ARA102668,ARA102721,ARA4203V3,ARA4103V4,ARA4103SV4,ARA4203XV3,ARA4303V3,ARA4105V4,ARA4105SV4,ARA4305V3,ARA4215V3,ARA4315V3,ARA102696,ARA102722,ARA4206V3,ARA4306V3,ARA4319V3 【Long-lasting Performance】:Gears for high strength. Made of from 7075 aluminium alloy for greater strength and stable driving performance.The gear set is with precision manufactured gear teeth for smooth, consistent performance,they works with low noise. 【Easy to Install】:Easy to install, all metal internal gears for high strength. Made of heavy duty hardened steel, long time life span. Easy to install and remove. 【Special note】:In the position of various screw holes, screw glue is applied, so that the screws are not easily separated from the upgrade accessories. #45 Steel 37T Main Gear&13T Input Gear Differential Case Diff Gear Upgrades Part for 1/10 Senton/Bigrock/Granite/Vorteks 3S BLX,Kraton/Outcast 4S BLX,1/8 Infraction/Typhon/Vendetta 3S BLX.Red