A4 2.0 tdi air filter in Audi A4 (B9) Forum Posted April 17, 2021 Hello folks, first post, has anyone bought the upgraded k&n type air filter and saw a difference? 97 quid seems steep to not get any real life gains from it.
A4 2.0 tdi air filter
in Audi A4 (B9) Forum
Posted
Hello folks, first post, has anyone bought the upgraded k&n type air filter and saw a difference? 97 quid seems steep to not get any real life gains from it.