- This is the RB Concept Sport 10, Standard Plug, 3 Port, .21 Buggy Engine. RB's Sport 10 is an extremely impressive engine for the price, making this an excellent replacement for RTR 1/8 buggies and trucks, or for the casual racer looking for a high quality, budget priced engine. This 3 port engine includes a 14mm crankshaft for excellent torque and high RPM. The improved crankcase design and re-designed cooling head provides a solid foundation and efficient cooling for this "next generation" 3-Port engine.
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