WANTED Z4M fitment 18'' wheels (Apex etc) and aftermarket backbox please!

[benny-g]

As per the title, currently have 19'' CSL style with Michelins Ps4s in near new condition, looking to downsize to an 18'' wheel, ideally APEX ARC-8 but will consider others, let me know what you have, happy to straight buy or swap/part ex for my current setup.

Also looking for a backbox, super sprint, Eisenmann etc, let me know what you have?

Thanks in advance!