[Karl07]

Hi and sorry if this is a stupid question, but I just got a bit confused.
I recently acquired a set of AP Racing brakes for my 86 GTS (AUS Spec) and when I was doing my research, the CP8350 (you guys call them something difference as part of your sprint and endurance packages, but they look identical and I think I spy "50" on the inside of the caliper) was listed as coming with aluminum alloy pistons by AP Racing themselves. With no option for stainless steel.
Was this something that you added as part of your kit? Or is it just because I'm in Australia?
I ended up going to a set of Pro5000+ front and rear as they were listed as aluminium or OPTIONAL stainless steel (I got the SS).