Can any one tell me please, what the circled black corrugated pipe does please? I have just bought a Walkinshaw WP-ACL-1002 cold air intake and not sure if the circled pipe work needs to be deleted.
Mechanical sound enhancer is the correct answer. Just pipes induction noise into the cabin as stated. No performance or critical component other than keeping stink out of the cabin. Plug the hole and you are sweet.