O.S. 21XZ-B V-Spec Speed Tuned Off-Road Comp. Engine

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This is the O.S. 21XZ-B V-Spec Speed Tuned Off-Road Competition Buggy Engine. In 2006, the IFMAR Off-Road World Championship was captured by Mark Pavidis using the O.S. SPEED 21VZ-B V-Spec. At the 2008 IFMAR Off-Road World Championship, Atsushi Hara claimed the victory with the O.S. SPEED 21VZ-B V-Spec II. The O.S. SPEED has once again evolved with a completely new design that surpasses the previous model in every aspect, resulting in the SPEED 21XZ-B. Based on the user-friendly features of the MAX 21XZ-B, the SPEED 21XZ-B features a tungsten-balanced and silicone-ramped crankshaft with DLC coating; a lightweight, low-gravity cooling head with cooling holes; a ceramic ball bearing, and more. These features allow the SPEED 21XZ-B to deliver instant throttle response and powerful torque over the entire rpm range. With the SPEED 21XZ-B, the power you need to win is available on command at your fingertips. Features: Race-Winning Power Characteristics: A tried and true 3-port sleeve design (3 bypass ports, 1 exhaust), provides smooth, crisp acceleration. This has been achieved through a combination of a specially designed "SPEED" inner head and sleeve porting. Fuel mileage has been improved by 8% * Outer Head: The low-gravity, black-anodized outer head features laser engraving and has been heavily machined for improved cooling and extra read more

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