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  • Inner Head Improves Idling Performance
  • Outer Head Has Been Made Lighter
  • Crankshaft Uses Two Tungsten Counterweights
  • 5 Scavenging Ports And 3 Exhaust Ports
  • Equipped With A Double-Adjust Type 22E(B) GT Carburetor

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    Copyright Text - 2025 Modelflight

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    OS Engines R21GT II Nitro On Road Engine

    SKU: OSM1DT00
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    The high-performance GT engine has evolved into the next generation! This OS Engines R21GT II On-Road Nitro Engine features a newly developed underhead, cooling-head, and crankshaft, specially made to fit on-road GT tracks. 

    $549.99
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    OS Engines R21GT II Nitro On Road Engine

    SKU: OSM1DT00
    $549.99
    Loading...
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    The high-performance GT engine has evolved into the next generation! This OS Engines R21GT II On-Road Nitro Engine features a newly developed underhead, cooling-head, and crankshaft, specially made to fit on-road GT tracks. 

    In stock

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