Within Stock rules???

Originally Posted by Tony Corley

The heads come from the factory cnc ported. When you can start with a bare, unported version and run your own cnc program, you can make it virtually undetectable. If you read my statement, I said those guys are smart, and I would bet money it would pass teardown. And if it can pass teardown, then it must be legal, right?

what makes you think that the heads are not the best they can be right from GM? Why would you have to start with a new head anyway? These cars were build in a max effort capacity to begin with by a company that has every resource.