[lkchris]

Well, it is 74 mm, 14 flats.

I use Stahlwille 3045 which I bought in 1990s for Mercedes M103 engine (300E) which was a metal filter.

Then used it on Mercedes M112 (320) and M272 (350) and on VW New Beetle TDI, all of which are cartridge types with plastic cap.

Now I use it on my BMW R1100 motorcycle and my Boxster.

It's practically the German standard.

Btw, the German standard for plastic filter caps looks like 25 nm torque, too.

Germans are like that.