Andymancos is right if you don't mind big bills after the year or well before - if its completely standard - £500 won't do it as you'll need an exhaust as well.

At the end of the year, you'll have a slipping clutch, oil pissing out of everywhere, a smokey turbo. Make friend with your local AA man.

I like to do things properly - that's why my 3door's a minter!!!

It's great having 350bhp over 270bhp, but not if the first time you try to blow away an M3 or TVR, you're left at the side of the road with him passing you laughing....

Also - if going stage 3 I recommend an oil breather kit and a swirl pot on your cooling system.

Put it this way - you stage 3 your car using Andy's advice and do 1 trackday, I'd arrange a trailer to pick you and your car up at midday.

You pays your money as they say!!!