15mm rear master cylinder with integral reservoir. This type of rear master cylinder was used on all triple disk brake Guzzi big twins for quite a few years, including these models: G5 Convert SP1000, SP II, SP III, Strada, MilleGT, California II, California III, early California 1100, 850T3, 850T4, 850 LeMans, LeMans II, LeMans III. This item replaces the obsolete and discontinued original Brembo item.
This master cylinder replaces original Guzzi part numbers 29667000 and 18667050. Associated Brembo part numbers 10.4388.02, 10.2657.10, and 10.2426.00.