4-Tec Nitro Upgrade Kit

Traxxas makes it easy to upgrade Nitro 4-TEC® TRX® Pro .15 nitro-powered models to the awesome power of the TRX 2.5 or TRX 3.3 Racing Engine. The kit includes all the necessary parts: header, pipe, pipe hanger, coupler, linkage, and additional components specific to each model. Major components come pre-assembled and pre-adjusted from the factory. Detailed instructions are included. (Engine sold separately)