Looking to get competitive in SCCA STX class and the JCW package is a legal retrofit on my old MCS. I am thinking of just the main engine power mods which I think involve the cylinder head, injectors, ECU, and supercharger. I don't need the intake as this is is allowed to be aftermarket in my class.

1. Can you just buy these parts individually?
2. What $$ am I looking at for these official factory JCW parts only? Is a full kit the only option?

Warrenty is not a consideration, just the HP gain.