Found… with the reference of the MANN filter in my Plus4 I found the

K&N E-2993 for about 75,-EURs.

About sound/power…
88CUI Harley DynaGlide… Sound: a little. Power: with a small work at the carb 10% at a dyno.
Classic MINI, 998ccm, enginerebuild, works. Power not noticeable (with the basis 42PS)… Sound: with phantasy.
Injected HARLEY Electra UltraGlide: Sound: not noticeable (with always modified exhaust), power: enough, no noticeable difference.

Greets from Mainz

René


2018 plus4 (sports green)
with a homemade really shiny red tinted dash…