The car that just won the 1/8th Masters class @ the Florida Winternats, started life as a plane old MRX4.It was updated to an R car then raced and won the 1/8th Masters class @ the Winternats in 2007. I ordered parts from nitrohouse and did the update in my trailer at the track on the day before the track opened for practice, converting it to an X car. I must say that it was the best car I have ever driven. Basically I ordered 2 of every plastic part
(So I would have one spare of everything) and one chassis plate, it was like 355 bucks for it all. The shocks and upper shock mounts front and rear are all the same as the original MRX4 car. I will round up some part #s and post them.