You are correct but these are all things that need to be considered. an ITR makes 3-4 hp with a CAI over it's improved resonator design. The AEM and Icemans I have dyno'd on B18C1's make about 8-10 whp. Just things to consider.

And IIRC they (GSR/RS/LS) are actually pulling their air for directly behind the ABS (Assuming they have ABS)