Hello people, I once again 😀 I just installed a sports air filter system from the USA so filters with aluminium tubes. Now I did a test drive and had to find out that it slows down a little bit at 4500 revolutions and pulls back from about 5000. No matter if I give full gas or drive normally. Exat with the 4500 it slows down and pulls hardly from 5000 then it pulls back normal. What can this be?? My vehicle data are Escort Cabrio MK7 85KW 115PS however have a a LMM and LLR of a 77kw, can it be because of that? Hope that you may know the problem, if I have posted this problem wrongly here, sorry already in advance. thx