Free Shipping on Purchases Over $150 to the United States!

DHM Stage 3 Kit for the 2022+ Honda Grom / Monkey

ECU Core

**Professional install is highly recommended. Ring gaps must be set, and base gaskets must be installed properly. Setup sheet is included. 

The DH Motoring Stage 3 Package includes the following:

Combined with your aftermarket intake and exhaust, this is the most you can get out of your Grom without doing any head work. After dyno testing we were repeatedly seeing 13hp at the wheels (SAE) run after run! The Stage 3 package makes more power than a stock Grom at every RPM and double the horsepower at 9000+ rpm! 91 octane fuel is absolutely required. Any fuel with a lower octane rating may result in engine damage!

You can choose to receive a preflashed ECU instead of sending yours in ($95 extra), or you can send yours in to be flashed. 

An oil cooler and extra crankcase vents are recommended for this kit. 

We offer the following crankcase vent systems:

AvailMS Crankcase Vent 

MO Power Crankcase Cover

Oil Cooler Kit: Kitaco x DHM Oil Cooler Kit 

Customer Reviews

Based on 10 reviews
cory northcott
A +

A +

Kyle Wood

I purchased the stage 3 kit for my 2022 Honda Grom. I received the order within 2 business days and had it installed by Mountain Motorsports in Oxford, AL. The power this kit provides is immediately noticeable. I can now go up hills in 5th gear and hold a steady speed. My average cruising top speed was around 62mph before the kit, now I can easily hit 73-75 mph. I am beyond satisfied with my kit from DHM and will definitely be doing business with them in the future.

Scott Kyro
Stage 3 Kit for the 2022 Honda Grom

Easy install, fun to ride, and awesome to show off!

As straight forward as this kit is to install, take your time and be diligent. You'd be surprised at how easy it is to work on these engines. Installing the Stage 3 Kit was a saving grace and it absolutely woke up my Grom. They'll send some guidelines with the kit as well.

When it comes to performance, no longer does my Grom slow down on inclines; as a matter of fact, I was able to keep up doing 60 uphill in the mountains of North Carolina and hit 70ish+ on a flat straight away. The power is there, along with a gnarly sound. I have the MNNTHBX Intake and Yoshi exhaust. Don't be intimidated though, any exhaust will do as long as you tell them which one you have as quite a few of the exhausts out there can get pricey for the Grom.

If you have a 2022+ Grom or Monkey and the spare cash, I would absolutely get the Stage 3 Kit for them.

Jason Mullis
Straight forward install

Easy and fired on first pop. Take ur time on rings and you will be satisfied. Woke my bike right up

Lugert Performance
Awesome company and awesome parts

I’ve used this kit 3 times now, it’s always awesome. Easy to order and great gains on performance. I will be ordering more! Thank you