One member told me this :those hoses are vacuum lines that should operate a air diverter in the air intake before the filter. What they do is when the engine is cold it pulls warm air from off the exhaust manifold to help the engine get warmed up then closes to allow cool air into the intake. If you follow the one that does not lead to the firewall you should find the air diverter
i am looking to do the same thing :) a for sure answer would be awesome !!