enhancing

Aside from wheels, body kits, remaps, exhausts, intakes, intercoolers, fuel pumps, etc etc, what are peoples opinions on the other best modifications? Having spoken to a few of the lads on here with fettled MK2 Leons and knowing what some of the MK5 Golf and Audi A3 lads have done, the...

I know there isnt much which is cheap but im tryna get a few more BHP out of the Cupra, already booked her in for a revo remap and I was thinkin a panel filter as the induction kits get to hot but it there anythin else i can do which is relatively cheap? Cheers