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DHM Stock Valve Ported Cylinder Head

$355.00
by DH Motoring
With Titanium Retainers

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 exhaust port shape and size 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

Customer Reviews

Based on 5 reviews
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Matt D.
Proper flow for the High Comp piston

When I finally felt the need for more power I sent my bike to DHM with a budget in mind and received an absolute beast of a bike in return. I never thought I would feel the back tire move around under acceleration on a Grom. I highly recommend DHM for dialing in the performance that you desire to get the most out of your machine.

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Jon B

DHM Stock Valve Ported Cylinder Head

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Michael P Lagrasta
Awesome product

So I bought this head to go along with my stage three kit from DHM! What could be said other then Sam this lil bike is an absolute blast to ride I am 240 6 foot and I hit 70 on the flats no problem. The mid range is insanity I have to keep telling my self it’s still a 125.

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Daniel
186 and ported headed

Have a186 tb kit. Bought a ported head and flash from dhm. Wow totally different bike. Worth every penny. Answered my questions about rig gaps. Thanks dhm.

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Peter Jr
186 kit and the Ported head

From start to finish an all the questions in between that David took the time to answer was great. The bike feels amazing. DHM For The Win..!!