So I want to buy a set of os4 jbw for the lupo.. But the et is et25 will they fit my 1litre lupo? Because it's say lupo et are 35 or something! Or would I need to do anything? Help please! http://item.mobileweb.ebay.co.uk/viewitem?sbk=1&nav=SEARCH&itemId=201011201339 Also would I need 7j or 8j or 7j front 8j back!? Also will I need 7j or 8j? Or 7j front 8j back?!