Which is better/bigger? I know on 90+ Integras they are 40/40, but what is the prop. valve on a 02+ civic si?

Reason I'm asking... I'm doing a brake upgrade on a 90 Integra sedan and I want to know if I should buy the prop. valve as well.

My future brake setup is as follows

Front - 94-95 Legend GS Dual Piston Calipers (and brackets), OEM Prelude VTEC 92-96 rotors (re drilled to 4x100)
Rear - EP3 Calipers (and brackets), OEM EP3 rotors (02-04, 4x100)
ITR master cylinder/booster, Russell SS Brake lines, Hawk Pads...

Any help would be appreciated..