Looking for some additional improvements for a 2005 r53 cooper s, onlydone1 track session in it, performed well but feel it could do with the following . If anyone has any of the following the want to move on?

decent coilovers
rear unrated ARB
lightweight “straight” alloys set of 4 - fab if they have decent rubber too, not fussed tho
airtect, GRS or other larger intercooler.

can collect, or happy to pay postage

cheers n beers
Rob R