They will work but put the shorter mount toward the center of buggy and longer toward outside. I put them in and didn't put the 3rd screw in at the very front of the mount since my Mayhem chassis didn't have the hole. They worked great but you can't use the roto start system then. Have to use starter box. Then you have to shave some of the opening and angle it where the flywheel comes out of chassis to touch starter box wheel. By this I mean you shave around the flywheel opening from the bottom of the buggy.

Rockman