HPI Nitro RS4 MT2 Super Nitro Rally, Sintered Differential Final Gear Set 86324. Condition is New. Also fits HPI Wheely King, Crawler King, Nitro3 EVO, Nitro RS4 3, Nitro MT, Prodrive Limited Edition, and other models shown in photo #2. Shipped with USPS First Class Package. Please check our other listings, we will be adding quality new unused RC items daily. Please feel free to follow us as a seller, appreciated