Off the top of my head I can't think of anywhere else that sells a 40bhp upgrade still keeping the warranty for under 3k, unless someone can point me out as wrong the exhaust and the induction kit are not as such part of the
JCW power upgrade, they are just part of the sound kit.
You don't just stick a new supercharger on a car and leave it at that. That is not how you tune a car properly.