Hks 256 8.8 Mm Camshafts For Standard Rb25

[Shockster0429]

I had a question about whether or not it is needed to upgrade the valve springs, now I know I can fit up to an 8.9mm lift cam into my stock rb25 head w/o have to remove any material, my motor has 100km on it currently. Will the stock valve springs be up to the task? I plan to rev her out to 7500-7700rpm. Also for any one wondering I am fixing the oil issue.. thanks

[BHDave]

The stock valve springs are fine, assuming they aren't 300k old and weak as piss.

Mine are happy enough with a 256 8.8 inlet and 264 9.0 exhaust (no head mods required). 7400 limit and roughly 110K old

But if the head is off i'd swap them anyway.