do these cars have a crankcase filter?

 

you have to add it

 

so they dont come with one? are they necessary

 

stock airbox comes with an oil sponge/filter. i didn't want to vent straight into the turbo when i added a "cai" so i installed a perrin/alta occ between the valve cover and intake tube. some people just stick a breather filter on the valve cover tube.

 

oh ok. i thought the crankcase filter was some filter inside the oil pan or something because it says crankcase