Standard type... waiting for BMC. I'm incontact with a guy of BMC technical department and when I'll be back home from emirates in February probably they'll use my car to set a new filter. It's the one called "CDA" http://www.bmcairfilters.com/infoCDA.asp
Tehy'll set in for crossfire, testing the car on Dyno before and after to check the HP increase. I let you know all the news and if the'll proceed with this project.