The O.S. Speed 21XZ-B Spec III With 21J3 is the evolution of a proven powerhouse that has been a winner at numerous races worldwide. With upgrades that enhance its performance and drivability you'll hear the difference in the engine's roar when warming it up. Once you've experienced the speed and power of the Spec III, you'll be on the fast track to the winner's circle!
|Displacement:||0.213 cu in (3.49cc)|
|Bore:||0.641 in (16.27mm)|
|Stroke:||0.661 in (16.80mm)|
|Power Output:||2.61 hp/2.65 ps @ 34,000 rpm|
|Weight:||12.45 oz (353g)|
|Includes:||Turbo P-3 plug|
|Requires:||glow fuel, tuned pipe and manifold|