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NOTE: This part requires additional parts in order to function properly. Please add all additional required parts to your order as needed.  These link will take you to the needed parts:


  • Iridium IX Spark Plug
  • Connecting Air Tube
  • High-Flow Oil Pump
  • Intake Manifold
  • Hurricane Racing Air Filter
  • Intake Manifold
  • Fuel Injector Adapter Kit
  • Throttle Body
  • High Flow Fuel Injector


  • Ideal engine part to complete Koso's big bore kit
  • Unique four-valve design increases air flow and performance
  • Provides more power and torque
  • Features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves

2014 - 20 Honda Grom / Monkey Valve Head Kit

SKU: MB-0950-0755
$749.95 Regular Price
$664.95Sale Price
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