OS Speed Tuned 21VZ-B V-Spec AL Engine

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OS Speed Tuned 21VZ-B V-Spec AL Engine

	OS Speed Tuned 21VZ-B V-Spec AL Engine

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	A new version of a popular powerhouse! An aluminum heat sink head combined with special factory tuning makes this a more efficiently cooled .21 VZ-B V-Spec competition engine! Aluminum transfers heat away from the crankcase more efficiently, for more consistent cooling. The specially coated, silicon-filled crankshaft features a precision ceramic bearing that greatly reduces friction – plus a Tungsten weight for added balance. A 3-needle, slide-valve carb allows for ultra-fine tuning for demanding race conditions. Available separately, the T-2060SC WN tuned silencer (OSMG2938) utilizes a welded-on pressure nipple, and was developed specifically for this engine. Now you can select the high-performance .21 VZ-B V-Spec with your choice of heat sink head: lighter weight magnesium (OSMG2081), or cooler aluminum! SPECIFICATIONS Displacement: 0.211 cu in (3.46 cc) Bore: 0.653 in (16.6 mm) Stroke: 0.630 in (16.0 mm) Practical rpm range: 3,000-40,000 Output: 2.5 hp @ 34,000 rpm Weight: 12 oz (345.5 g)