Anyone running this here? I am told it is the best. Made by Mann Hummel.

http://https://www.mann-hummel.com/fileadmin/user_upload/service/catalogues/pdf/ProVent_en_2013.pdf

Features include a synthetic filter media, pressure release valve and drain for oil return to crankcase. Pricey though, at Php7k+ est. Php2K+ for the filter media replacement.