Kroyer is a big push rod company building Nascar and trophy trucks motors , they have a joint venture with Holz racing on this design motor . They ran the hole last racing season on the same motor built by Kroyer without a failure . Being the RZR coming from a similar design as a small block chevy it was good to go to someone who has 40yr in push rod design , the biggest problem with this motor is getting the geometry correct with over head cam guys have know clue about this motors ,polaris designed this motor off of a chevy design , thats why they are braking cranks . I am also getting there new bullet stroked crank when released . I was the first consumer to get one of these motors so i paid more money to have it done by kroyer , shipped as a crate motor with dyno sheets . When i went to Chris at benchmark and told him i wanted a RZR he rolled his eyes and told me all the con's but they handle incredible so i wanted it . Then when i asked him to mod it for me he ran . Chris is the one who hooked me up with Kroyer and told me don't go anywhere else unless you want a broken mess , so i took his advise and spend the money . I also have Dan's from lonestar suspension with Elka's and everything else you would want to have on a car . The car has way more travel then my rhino and is 1 foot wider sitting on 72" over all . I just looking forward for the bigger motor do the line , they are saying 100 in the future , not bad for a car that only has a GW of 900 pounds . I still love my rhino just wanted a sport car so i gave it to my wife and kids .