I am reinstalling my exhaust.. The Split Air Pipe goes into the hose hanging next to the manifold.. BUT where does the hose that comes off the Split Air Pipe go? What is this hose used for? Thanks for everyones help.

 

it channels air from the airpump into the main cat. if you ditched the airpump and main cat, then you can ditch the pipe as well. and i recomend removing the ACV too.

 

Thanks...