There are a couple people that have the Mazdaspeed setup, but so far I haven't seen anything on the specs of it. There's only the vague description of "up to 90% stiffer than stock depending on option level." Does anyone have any real concrete numbers on the springrate of the Mazdaspeed coilover setup? Thanks.

*****

EDIT: I'm going to answer my own question as I just talked to a vendor. They're 400 front and 275 rear.

 

They're the Eibach Pro-Street kit

 

I know they're manufactured by Eibach, but heard they're specced to Mazdaspeed's requirements?

 

I doubt it

 

that 90% stiffer stuff is prolly compared to the base model autos suspension....the spring on my keychain is 90% stiffer than that garbage.

400 and 275 is not stiff at all. i got 509 front and 390 rear and i could put babies to sleep on the comfy ride

 

stiff/harsh is usually more dependent on shock valving