The only reference to it I've found states a M10S M series. Not sure.
Thanks for the info.
M10S is correct.
The chassis designation/naming is pretty confusing. From what I've read, the "M" is for "semi-Monocoque chassis" or "Magnum", the "10" is for 10 airbags, and the "S" is for "S side radiator" or "Semi-Monocoque" (depending on who you ask).
I'm still learning about all this - so someone here with more knowledge may jump in.
I've read the Koni shocks are "double acting" and the Bilsteins are "single acting" which explains the cost difference.
I don't know if this is true or not, but those that installed the Koni's like them.