I have a used Gruppe-M intake kit for sale for 00+ M5's. It is the carbon kevlar so the weave is a lime/yellowish color. The condition is excellent. They are put together so all you have to do is remove the stock air boxes and bolt these in place. Probably take you 10 minutes and you need basic hand tools ratchet and screw driver. I dot not have the original box nor instructions which you dont need anyways.
I recently cleaned the filters about 3 weeks ago, I did not re-oil them due to MAF's being delicate.
Please only serious inquires only. Just give me email i can send you pics.
I can ship it anywhere in world also.
Thanks
Gorilla Beast.