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GPH/OBR310 Helicopter Edition Engine V2 OS Max 91 3D Speed OS Max 91 3D Speed/PowerTune Muffler Combo
OS Max 91 3D Speed
List Price: $649.99
Our Price: $449.99
Savings: $200.00
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OS Max 91 3D Speed/PowerTune Muffler Combo
List Price: $859.97
Our Price: $569.99
Savings: $289.98
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GPH/OBR 310 Helicopter Engine! OS Max 91 3D Speed Engine Combo for the OS Max 91 3D Speed and our proprietary Powertune 1.05 Muffler
OS Max GT15HZII Engine TRM VX310 Special Edition Engine V2
OS Max GT15HZII Engine
Our Price: $499.99
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Meet the OS Max GT15HZII!

This is the latest version of the proven OS Max GT15HZII gasoline engine. Out of the box this assembled engine includes

  • The lasted design piston/Ring
  • Machined back plate for maximum piston clearance
  • .90 size 8mm crankshaft - fits most 700 class fan/clutch/hubs
  • Latest design wire piston pin clips
  • OS Max HD cooling head- significant cooling improvement
  • OS EI system, spark plug, fuel pump, throttle arm and instructions
  • Does NOT include muffler

Perfect fit for the JCD 5xx gas conversions
Fits most 700 class helicopters including the Goblin Nitro (with fan shroud modifications

NOTE: See additional running requirements under Technical Specs
TRM VX310 Special Edition Engine..Includes custom air filtration system, custom fan shroud, and complete clutch with JCD custom base