I do not yet own a 308, so I read the chat with great interest, particularly the common problems, improving engine performance, braking and suspension tweeks. It seems that Brembo does not offer an improved rear brake, so, I was wondering if someone had manufactured a rear caliper mounting spacer that allowed the use of a bigger rotor. What is the diameter of the rear piston. The 914-6 caliper is a few milimeters bigger than the standard 914 caliper - does ATE manufacture a rear brake caliper for another application that offers more piston area?? I installed a 911 caliper spacer in the 914-6 ATE caliper to enable me to run a vented cross drilled rear 911 rotor. Bigger "off the shelf" parts could be a very cost effective solution. Slowing for a beer, I remain, CNM.