Combo kit is all you need. It is an easy installation and the tank does not need to be removed. See instructions below.
https://www.r18forums.com/threads/anyone-install-an-aftermarket-air-filter.319/
I purchased this new 8/4/2022 and it has 1272 miles and looks perfect. Bike is all stock but added a Corbin seat $780, DNA Air Filter with DNA Frame, and Wunderlich device holder with Navigation adapter. Bike is in suburbs north of Chicago and break in service was done last Fall. Title in hand...
It has been several years since I owned a BMW but purchased a new leftover R18 First Edition on Saturday. In recent years I've been basically riding Italian bikes and Triumphs but liked the way this R18 looks. I currently have a Rocket 3 GT so I thought adding this didn't makes sense as the...