Dragon IV Edition 2 .21 3-Port Pre Break-In Nitro Engine

The is a 3 port 3.5cc off-road pre break-in engine. It only requires a few tanks of fuel, run easily in your car for the final break-in process. At that point you are ready to hit the track and go racing, providing a huge savings in time and money. Based on the Dragon IV engine, this engine includes both the injector backplate and 7.5mm Pro carburetor. This is a pre break-in, 3 port engine designed to the highest specification. Features: Injector backplate: It assists the fuel flow from the crankcase to the combustion chamber by pulsing fuel through the backplate in a more effective manor. The result is a much quicker return to idle and an improvement of fuel efficiency, benefits that all racers will appreciate. Carburetor: This is a 7.5mm bore size. It has been developed to allow for extended run time and even smoother throttle control.  The crankcase has been redesigned to improve the efficiency of intake and exhaust, the flow of fuel from the carburetor to the combustion chamber, an