HKS intake question.
 

Ok, the HKS intake works great.
But when I installed it the instructions are in Japanese....
I did not hook up (see picture) and the car runs fine.
Do I need to hook this part up?
Or leave it as is.
No cel lights or stalling are present.

I dont have the HKS, but to my understanding most aftermarket intake requirer to remove the factory VFAD, thus no need for the above things that you circled. BTW I've Revi (dont need those too).

don't need it. i have the hks, ran it for quite some time, and no problems!!