You will need the rear engine subframe from a PS car. The non-PS rack has a physically smaller diameter than the PS rack so the subframe is designed for that (otherwise there completely interchangeable). I installed a GS-R rear subframe and GS-R PS rack on my hybrid but without all the PS stuff. The CX (and I guess DX) non-PS rack has extremely long ratios that make almost any turn a hand over hand affair. It's easier on you when your stopped to turn the wheel but ruins any kind of sporty driving. The GS-R rack was a little harder to turn over but you never have to take your hands off the wheel except for slow sharp turns and I didn't mind the exercise when parking.

Here's a pic of the PS rack's subframe, you can see the cutout for the rack and it's bushing.