Correct. Unless you get the MSP specific Tokicos, then it's fine with MSP RB springs. Nice springs either way you go. If you can find the ultra mega rare Mazdaspeed B-Spec springs, jump on those. I had a set on my P5 and loved every second of them.The aftermarket RB springs or the MSP RB springs? MSP springs will sit lower in the rear because the shocks had a higher spring perch. If they're the aftermarket RB springs they'll be fine. No experience with those springs, but RB makes quality stuff so they should be pretty good, and Tokico's are a great option for struts. Aside from that, I would probably go Tein H-Tech's if you dont want drop.