I have yet to see Cast Iron PBR Cobra Calipers. at least from 1994 to 2002. All have been aluminium. I have two pair off of a 96 Cobra Say Cobra on them Also PBR made in AU and are the 38mm Dual piston calipers. Guess What Aluminium.
SCCA National License 303439
ASedan Mustang # 76 Cen Div
"Yes It's Fast, No You Can't Drive It!"