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DHM Ported Cylinder Head for the 2022+ Honda Grom / Monkey


This ported cylinder head provides HP and Torque gains across the entire RPM range by optimizing the port shape and flow. It includes stiffer valve springs and has clearance for any aftermarket cam on the market. Expect noticeable power gains when adding this head to any setup. 

  • 25mm intake port for use with the stock throttle body
  • Flush valve guides for optimized port flow
  • Ideal intake port flow to maximize velocity
  • Compatible with any piston and/or big bore kit on the market
  • Compatible with any Grom cam on the market
  • Requires additional ECU tuning or Standalone ECU adjustments
  • Includes upgraded valve springs and retainers

Pairs well with either our S1 or S2 Camshafts!

Customer Reviews

Based on 1 review
Michael Ivory
New Years up grade

Have not installed ported head yet or the 27mm throttle body, aracer, af2 all going on in January, will be glad to rate it then.