Initially, I thought it's a fully height adjustable coilover, as such should be able to go as low as 330mm, which I assumed from looking at the bumpstop trimming suggestion and the "30mm lower than standard" post.
So I installed the coilovers at Centreline with a height setting of 340mm at the rear an 330mm in front. Then I encountered bottoming out issues occasionally and a metal to metal hitting noise once in awhile. So I pmed SK and this he mentioned that:
Look at the bumpstop trimming pic, does the standard->350mm look like a 30mm difference?
Anyway, on my stock setup, my hub centre to guard height is 350mm on my 17" aftermarket rims. And yes, I'm surprised that the coilovers aren't designed to go lower.
Just a note for people since the suggested ride height hasn't really been mentioned before.