Hey guys, I have a 2004 5.7L. Ive had a CAI on the truck basically since new. I have a filter on what i believe is the Crankcase breather. However, i am getting a lot of blow by. Oil is getting everywhere. Every so often i have to replace the filter because it is clogged with oil. My question...

I put on my CAI the other day and I was disgusted when I saw how dirty my throttle body was! Does anybody know if Putting a breather filter on would effect emissions testing if so should I go with a catch can?