Saw a couple YouTube videos where guys had these little filter like things on their valve covers? What do they do? Eye candy?

 

I beleive they are replacing the PCV...ok on carbs, have "heard" not ok on EFI

 

If its a stock valve cover, it has two vents. One is PCV (positive crankcase ventilation), and is located at the rear of the valve cover, and has manifold vacuum applied and controlled by a valve, the PCV valve. The other is at the front, and it connects to the stock air filter housing for burning the crankcase fumes that the PCV doesn't get, and/or to draw air from the air cleaner(clean air) for the PCV system(primarily).

The little filters you see on the vids is just primarily to filter the air coming into the valve cover/PCV system, bypassing the air cleaner. You'll probably notice they don't have stock air cleaners also...

 

i have a 3vze EFI with a filter on the valve cover. I used it to replace the hose that goes into the air intake tube. i built a custom ISR on my truck and didnt want to drill into the new pipe so i used the filter. check your facts. nobody replaced the pcv. check your facts a lot before you say such ridiculous stuff.

 

Subscribed, wanting to see a picture of this set up.

 

Check my build thread. you can see pics of this set up

 

OK I mean pictures on a 22re.