it's the tube that runs from your valve cover to the stock airbox. I beleive it puts out oil, so the catch can is to attach to that hose so that when you upgrade to a cai you don't have oil dripping down your cai and into your nice new air filter.
delphis wrote:it's the tube that runs from your valve cover to the stock airbox. I beleive it puts out oil, so the catch can is to attach to that hose so that when you upgrade to a cai you don't have oil dripping down your cai and into your nice new air filter.
What will happened if it does drip on the air filter?
after enough oil I would think it would render the air filter pretty much useless because the oil would get into the pores and just completely clog them up.