Traxxas TRX 3.3 Rear Exhaust IPS Shaft Standard Plug, Slide Carb Engine (Pull Start)This is the TRX 3. 3 Rear Exhaust IPS Shaft, Standard Plug, Slide Carb Engine, Pull Start engine from Traxxas. Traxxas TRX racing engines are fueled by a passion for performance, innovation and quality. Traxxas engineers are dedicated to redefining the state of the art in engine technology. This includes listening to our customers, and developing new standards and conventions that would meet the performance challenge. The TRX 3. 3 Racing Engine draws