Hey I had the new EZ Start 551 Cams from S&S installed last week with my conversion to gear drives. I just wanted give you brief overview. My bike is still 95", with MMFI, power commander, AN Big sucker and 04 CVO Pipes. I went the the 551's not so much for the ez start feature as for the cam grind and the gear drive. They are a blast and are everything they are advertised to be. They are "on" from idle until 4500 rpm (that's as high as I have rev'd it) making 2 up riding a blast, and just riding in general a lot more fun. My twin cam now sounds like my EVO used to gear drive wise, but for me, that's better than the cam chain tensioner debacle. 65-75 roll on's a breeze and at 80 I still have big chunk left. The stock 203's were ok but these 551 really are enjoyable. So if your looking, you won't be disappointed!