That Cen car you have to contact Cen and pre-order it. The Big Block Schumacher car has been offically clocked at 79mph and you can get parts for it at Schumacher USA down in Florida , they are fast sending out orders. I like putting .21 size motors in 1/10 scale cars. I have a old hpi R-40 that I put a .21 in and it is really fast. And a V1RRR with a .18 OS TZ I call it my combo basher because I can road race with it and Drag race it.