I would reccomend the hkr rs intake gains are extremely good once its tuned for the car 2 thumbs up for hks intake =)

 

Hows does the HKS RS do against the APEXi intake + induction box?

 

I like my injen intake.

 

Wouldnt dropping in a k&n filter make the turbo spool better and make the bov more audible? If it would then I would get that over the hks intake, especially if it only makes approx 5hp (assuming you are not going to get the car tuned).

 

Stock with K&N panel filter is best if you're not runing a stand-alone ECU or have had your chip reflashed.

On most EVO's, major changes in intake will cause the ECU to reduce boost.

But if you're running a stand-alone ECU, the bigger the intake, IC pipes and intercooler the better.

 

would the apex box even fit the hks intake pipe mated to the apex filter?