no most of them are "box stock" from Harbor Freight with the governor and low oil sensor removed and the exhaust box removed and the wiener pipe open and wrapped, then running a gear rule on ELs @ #330 and 360, Carl Williams started this @ Dexter (LCS) and sealed and sold them himself for $175 called "Black Sealed" #XXX, I'm guessing they make about 10 hp @ 5400 to 5600 rpms it was supposed to be an economy entry class, since he's shut down JL's Super Speedway in Lizella, Ga. is trying to keep it going with an track rental motor class, they have 10 motors and you just bring you kart and turn them back in after the nights racing, I think it's $35 to run the class, they'll run with a weak clone on 80% used up pink and blue maxxis if you get the ELs prepped up to their best potential.