I took the HKS RS off and put the stock intake back on. Since I did not install the HKS, I do not know where the small Vac hose on the bottom of the intake goes.
Please let me know. Right now I just have it blocked off.

 

i dont remeber any vacuum hoses being attached to the intake box, do you have anypics of this area or what does the hose attatch to on the car.