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

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The DH Motoring Stage 3 Package includes the following: DHM ECU Flash DHM High Compression Stock Bore Piston TB Camshaft or Decha HR Camshaft NGK CR9E Spark plug with spacer Combin ed 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 ($115 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 Install: Show more