Just bought and runs great. Some minor cosmetic issues but seems mechanically sound. One thing I noticed in the engine compartment was on the passenger side next to the radiator was a plastic pipe that had what appeared to be an accordion or bellows type of design. It seemed worn thru. What is this and how important is it to fix right away? Thanks for any help. Also, should I consider a K and N air filter or cold air intake? It has the 2.4 auto.