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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 13 reviews
Cooper F

Didn't get this exact package, but have all components and tune installed. Properly broken in, and been absolutely beat on for a couple hundred miles. Bike works fantastic. The combination of piston, cam and tune make a huge difference on this little bike. Love it.

Christopher Adames
Awesome kit

This stage 3 kit is a nite and day difference, the bike is very quick compared to the stock setup. Only thing I would like to see is some detailed instructions sent with it. Other than that very please awesome kit!

ricardo serrano
grom 2022 stage 3

Super well built gives that extra power to your grom

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.