The S1 cam and ecu flash, along with an intake and exhaust, made a huge difference on my 22 Grom. David was quick to answer a question I had, and install went quickly and easily. I can make full use of the RPM range now without power falling off, and I picked up 10 mph for top speed along with the ability to lose less speed on longer uphill sections which was my original goal. The flash runs perfectly. Can't recommend this combo enough and will definitely be doing business with DHM in the future.