Mazdaspeed Coilovers with stock springs?

[carbon3]

I have a opportunity to purchase a mint set of Mazdaspeed coilovers, Only problem is the rears are missing the sleeves to adjust the height, so the rear would be at the lowest setting no matter what. My question is could I just run the stock springs? I find the rear sits low enough and I would just macth it with the fronts or lower it abit. Would it make the rear bouncy or any negative affects?

[speed77]

higher rate front springs (as found on the MS coilovers) paired with stock rate rear springs will change the handling balance of the car at the limit. You will end up with a car that under-steers more. Ride comfort shouldn't change much as the rear spring rates tend to affect ride comfort more than front rates.