If you are interested in a set of 912uls pistons n cylinders send me a text to 580-513-8153 and I will give you a call. I changed to the 115hp zipper kit in September and will sell my old cylinders. They had less than 300 hours on them when I made the switch. I flew out to Elko Nv where Hal did the changeover for me. Regards Rodney Wren N357RW Hugo Oklahoma 74743