I just sold an rs4 3 type ss with the 12r engine and 2 speed and let me tell ya that little car will flat out fly. 50mph with no problem and the car is fun as can be to build-no problems and even comes with the shock oil and locktite. I will never buy another ready to run kit because ive always had problems with stuff coming loose or not being tight and falling apart thats why I liked this kit. You wont be sorry with the hpi products they are very high quality.