The brake discs have a protective plate.

The Rear side uses these part numbers:

928.352.081.00 (Left and Right side 1978-1982 model)

928.352.813.03 (Left side 1983-1991 model)

928.352.814.03 (Right side 1983-1991 model)

928.352.813.05 (Left side 1987-1995 model)

928.352.814.05 (Right side 1987-1995 model)

The front side uses these part numbers:

928.351.083.00 (Left side 1978-1986 model)

928.351.084.00 (Right side 1978-1986 model)

928.351.083.03 (Left side 1987-1991 model)

928.351.084.03 (Right side 1987-1991 model)

928.351.083.04 (Left side 1992-1995 model)

928.351.084.04 (Right side 1992-1995 model)