Bill Skillman and Tripp Carter at NMCA World Street Finals

[Superfan1]

Originally Posted by onefarmer

I belive the rules for the CJ are the same in both sanctions. There was a blower housing question that came up at Indy US Nats that was to be a ford paperwork error. The CJs are super fast at both places..

The NHRA has changed the size of the upper pulley on the supercharger of the Cobra Jets numerous times in an effort to slow them down supposedly to maintain parity in the Showdown. That is why the Cobra Jets are significantly quicker and faster at an NMCA race.