Hiya & welcome to the friendliest Mini Club in the UK
Hope you enjoy your time on here and that you get to come along to a club meet to meet up with everyone & look over each others Mini.... it's always a good laugh at the meets & held at places where the food & atmosphere is recommended.
Look forward to seeing pics of your JCW, sounds like you got a right bargain if they didn't realise it was a JCW!!!
As Chris (Mr Cooper) said, alot of people get the Dave.f hybrid airbox from
www.Minitorque.com and this has given impressive results. Myself & a few other have got the ITG air filter from Vecchio Engineering and I've been impressed with this too.
www.vecchio.co.uk