Traxxas TRX 3.3 Nitro Engine w/ IPS Shaft & Recoil Starter - 5407The powerful TRX 3. 3 racing engine with IPS shaft and recoil starter delivers unbeatable performance on or off the track. The engine features a precision composite slide carburetor, PowerTune cooling head, dyno proven IPS crankshaft, and multi port rear exhaust. Years of testing and proven performance deliver the easiest to tune, most dependable, most powerful Ready To Race engine available. It's competition proven power with convenience and