hi Guys
Im looking for proof before and after air filter mods (bmc,K&N vs stock new filter)did the seach

will an aftermarket race filter benefit more from the ram air effect?
next question: in the ram air box does the baro sensor detect the positive pressure so the ecu compensate for the fuel?
should i build the pcv map and leave some room for the ram air effect?
target 13.6 best ratio so put it down to 13.2 and always be in the safe zone...
or finally should i buy the auto tuner ?
thx for helping