Thanks a lot for posting this. I've had my PFC01s on for over a week now (was at the track last weekend and haven't had time to swap them yet) and the noise they make is unreal. Pretty funny rolling by a sidewalk cafe with the clatter and squeal... So the shims just sit "loose" between the back backing plate and caliper? I'd like to give this a try when my stock pads wear out.
08 E90 | Jet Black / Black | 6MT
Mods: RAC RG63 w/ Pirelli Corsa 255F/285R | Akrapovic Evo Exhaust | OEM Blacklines
Winter Setup: OEM 18s w/ Nokian Hakkapeliita R 245/40-18