Cheers for the reply I have the cat back exhaust with centre decat kn induction and hks blow off..so basically next is fuel pump and plugs and map or the ecu is the esl plug and play?Your very welcome to the club,
Panel filter,
Upgraded fuel.pump,
Upgraded heat 7 plugs
Turbo back or cat back.exhausts with second decat .
Then and most importantly Remap.
Version 5 classic like yours ecu are mapable I think .
or go aftermarket/Piggyback ecu , like esl, link,
Best of luck with it