i just replaced my factory air intake,filter with a [email protected] system.Install wasnt bad but i have a hose that was clipped onto factory air box that has no purpose now on New System.The hose goes somewhere down towards bottom of engine,cant see where it goes to exactly.Instructions dont even mention the hose.Truck is running great,no warning lights.Anybody have any idea what the hose is for. 2005 Nismo KC