Honda Grom Stage 3 | DHM Piston, ECU Reflash, and TB Camshaft

DH Motoring

Sale price $275.00 Regular price $335.00

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Customer Reviews

Based on 51 reviews
Order Now!!!

Felt a difference instantly, Stop thinking about weather you should order the Stage 3 or not and place your order NOW!!! lol You wont regret it and the turn around time with DHM is A++++, This is the site to buy from, Thanks a lot for doing great business and having great products.

Anousone Phimmasone
Stage 3

Still breaking her in

Evan HD
Amazing modification

Don't regret buying this at all. Make sure you have an aftermarket exhaust and intake to get the most power out of it, they both make a huge difference.
Took me 6 hours to install with screwing around. I did my friends in 1.5 hours actually working on it consecutively. Got the speedometer to 137 km/h full tuck. (13t front sprocket)

Ryan Stephens
2015 Honda grom stage 3

I’ve put 1000-1500 miles on this kit I didn’t expect for it to pull like it does. After 7k rpm it pulls hard to 10,200 rpm. I cruise at 70MPH with a 14t sprocket at 9RPM. Revving it out to 10,200 gets your adrenaline rushing maxing out the RPMS. And this dude will text you back quick.

D Grant
2014 stage 3

How Honda should have done it. Big improvement on power mid and top end.Picked up 12 mph now that engine has the power to rev higher in top gear.Fast service and shipping.

The DH Motoring Stage 3 Package includes the following:

  • DHM ECU Flash
  • DHM High Compression Stock Bore Piston
  • TB Camshaft
  • NGK CR9E Spark plug with spacer

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 13.5hp 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.