To confirm fitment here is the link to the parts list:
http://preisliste.ac-schnitzer.de/ac...swahl=Fahrwerk spring kit
for 316i + 318ti
with M-Technik shock absorber
consisting of:
31333620 spring front axle x 2
33533622 spring rear axle x 2
Sent e-mail to listed ACS dealer (cecwheels.com) to see if they could provide specs. I'll post if I get a response.