Does 1 of them K&N veted oil caps do anything??

probably so if you have a cai you don't have to reconnect the drain line thing. I just threaded another hole and bought an npt valve piece for the PVC pipe. Those filtered caps are pretty cheap and replace that little line so i think i'll look into them. btw i dunno but i haven't seen one that's a k&n?
 
They are PCV valves....long story short, they vent the crank case gase through the valve covers. Normally they connect into the air breather and have a filter. I take it they are not really necessary as you can get different ones. I assume as long as it has a opening to vent and no dirt can get in there all is good. As for the K&N They may be better but seeing what it is and its function I cannot see too much of a performance gain. Looks wise, they look better than having hoses. Hope this helped.
 
Prince95GT said:
what is thier purpose?

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