Brake Master Cylinder for Single Line Systems Pre-1976

The Mini Sport Classic Brake Master Cylinder GMC171MS is a meticulously engineered replacement designed specifically for the Classic Mini single line drum brake systems before 1976. This updated master cylinder incorporates a modern plastic reservoir, allowing for easy monitoring of fluid levels, a crucial factor in maintaining your Mini's braking performance and safety.

This direct replacement is not only a nod to modern advancements but also respects the heritage of the Classic Mini, providing an ideal balance between original aesthetics and contemporary functionality. It is designed to replace the original tin reservoir master cylinder (GMC171OE), ensuring a seamless fit and immediate improvement in brake system reliability. For Mini Cooper S and 1275GT models equipped with front disc brakes will require a master cylinder with a larger reservoir (see GMC172OE for the original metal version).

For enthusiasts looking to maintain or restore their Classic Mini, the GMC171MS is compatible with essential components such as the 31G279 single line master cylinder gasket, 14A6733 master cylinder mounting plate, MCR11.24.04.05 master cylinder mounting plate gasket, CLZ512 clevis pin, and the high-performance CAS1704 Castrol React brake fluid, ensuring a comprehensive upgrade.

With a bore size of 0.70", the GMC171MS offers precise hydraulic control, ensuring responsive braking. For those seeking the original all-metal design, the GMC171OE is available, catering to purists and those desiring a larger capacity type for the Cooper S the GMC172OE will meet their needs.