Car appreciation... the aesthetics, the engineering, etc

The JCW are great but you pay a big premium for one from what I can see, and if you just wanted the performance it’s easy and relatively cheap to replicate. Off the top of my head it’s a reduced pulley on the supercharger, cooler plugs, a different intake system, higher capacity injectors, exhaust (not sure about manifold) and a different map. You could get a good chunk of the gains with a pulley/plugs/filter for a couple of hundred quid. Things get a bit more expensive when you start looking at the suspension/brakes element.