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

Name: DH Motoring DHM Ported Cylinder Head for the 2022+ Honda Grom / Monkey - DHM Ported Cylinder Head for the 2022+ Honda Grom / Monkey
Brand: DH Motoring
SKU: 39766272671847
Price: 379.0 USD
Availability: InStock
Rating: 5 (9 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$379.00

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Color

Black

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Description

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 gai...

Reviews

5.0

12 ratings

Like almost everything done to the head except for I thought I was getting titanium springs and retainers, but apparently that’s extra. I tried to order them when they built it and the guy talk to you said it was all included. But when it arrived, it had zero titanium.🤷🏻‍♂️ yes I have to order more stuff to make it correct.

AJ · July 4, 2026

smooth inners..

i have yet to use it. but the porting job feels smooth on both intake and exaust ports. I'm paring it up with my Takegawa 145cc.

Abdul · January 25, 2026

Wowww!

I have incrementally been doing upgrades to my 2023 Honda Grom, with this ported and polished head and the koso 34mm TB being most recent. DHM 149cc, DHM S1 Cam, DHM P/P head, Koso 34mm TB and DHM tune. Wowwww...this head and TB really woke this bike up. Revs so quickly and I'm more than pleased. David answered my questions quickly and customer service is A1. A+++

Elmer · August 24, 2025