NEW Aluminum Big Brake Calipers for the 1975 Opel big brake system. A good upgrade for ALL Opels that have converted to the big brake system. About half the weight of cast iron brake calipers. Sold as a pair Right and Left. Sold unloaded. See part numbers 4010 pads and 4034 pad mounting hardware to complete the caliper. Use with Part# 4002 big brake rotors. Note: May not work with some wheels unless a spacer is installed.