DHM Honda Grom Stage 3 Package (UPGRADE for prior DHM Customers)
Great product, very well made! This was the perfect addition to an intake, exhaust, and cam. The installation is pretty straight forward, especially after watching Unknown Overlands video.
I notice stronger pulls off the line, along with more power throughout the climbing revs.
Only thing I needed from the auto parts store was a qt of oil and a NGK CR9E spark plug.
Don't forget to reset all of your sensors after this install!
For anyone wondering or on the fence about the DHMotoring Stage 3 kit! Its fantastic!
I was a prior DHM TB Cam and Flash customer, and I was completely happy with the setup. But once I saw his Stage 3 kit I had to try it.
First off, price wise, a no brainer and complete bargain!! The kit is all inclusive. Gaskets, spark plug, spark plug spacer, piston, etc.. (just missing a beer or two) Just like the first time, turn around was exactly one week from the day I put my ECU in the mail until the kit and reflashed ECU was at my door.
I just returned from my maiden voyage and I’m incredibly happy! The bike has a very noticeable improvement in power at lower/mid RPMs and I still have all my high RPM power from the original cam and flash. Wind and hills are much less of an issue now. Another awesome thing is I no longer have the big “drop off” of power between shifts. The powerband is much broader. Top speed hasn’t increased for me, but I can get to that top speed MUCH easier and more often. Before, all it took was a slight hill or wind and I would never see 70+mph. I’m confident I can get to 70 anywhere. Stock gearing 220lb dude.
Thanks again David Hugh for always being a click away with questions and issues!
Amazing product like normal
Added the piston definitely adds back the low-end power after installing cam. And balance the power overall you will feel a bigger difference. And it's wheelie are so much easier now too. David kill it will this!
This is the Upgrade kit for existing DHM customers! If you do not already own a DHM Stage 1 flash or cam package, do not order from this page. You can order a complete kit HERE.
The DH Motoring Stage 3 Package consists of the following:
DHM ECU Flash
DHM High Compression Stock Bore Piston
TB Parts Camshaft
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!
We are not selling preflashed cores as part of upgrade packages. You must send yours in to be updated. This is subject to change, but at the moment there will be no exceptions to this.