The updated design of the two generation V8 simulation engine, the power core can support the standard 550 level of the brush motor assembly. Gear group reconfiguration is implemented using the JK generation gearbox housing. Capo original steel ball clutch makes the progressive gear more smooth, 1:17.2 /1:6 double speed design, close to 3 times the tooth ratio difference in the compact box, the high quality carbon steel material gear group with 42-48HRC hardness with the quenching heat treatment and the mixture of the big teeth of the imported steel material. If your item got any problem, please contact with me, we will help to solve and, we are very familiar with this product. But we can help to avoid this, please contact.This item is in the category "Toys & Games\Radio Control & RC Toys\RC Model Vehicles & Kits\Cars & Motorcycles". The seller is "i-love-tea-time" and is located in this country: CN. This item can be shipped to all countries in Europe, all countries in continental Asia, United States, Canada, Australia.