DH Motoring Stage 3 Performance Package — Maximum Grom Power Without Head Work
The DH Motoring Stage 3 Package is the ultimate bolt-on performance upgrade for your Honda Grom. Engineered for riders who want every last horsepower without touching the cylinder head, this package delivers proven, repeatable results on the dyno.
What’s Included
- DHM ECU Flash — Optimized fuel and ignition mapping for maximum power and reliability
- DHM High Compression Stock Bore Piston — Increases compression ratio using your factory bore for a direct-fit power gain
- TB Camshaft or Decha HR Camshaft — Aggressive cam profile for improved airflow and power across the RPM range
- NGK CR9E Spark Plug with Spacer — Proper heat range for high-compression operation
Dyno-Proven Performance
Combined with your aftermarket intake and exhaust, the Stage 3 package consistently produces 13.5 hp at the wheels (SAE) — run after run. It makes more power than a stock Grom at every RPM and delivers double the horsepower at 9,000+ RPM.
ECU Flash Options
Choose how you want your ECU flashed:
- Send your ECU in — Ship us your stock ECU and we’ll flash it for you
- Pre-flashed ECU — Receive a ready-to-install pre-flashed ECU
Requirements & Recommendations
- ⛽ 91 octane fuel is absolutely required. Lower octane fuel may cause engine damage.
- Aftermarket intake and exhaust required to achieve rated power figures
- Oil cooler recommended for sustained high-performance use
- Extra crankcase vents recommended for this kit
Fitment
- 2014–2020 Honda Grom
- 2019–2021 Honda Monkey
