MGB Original Clutch Master Cylinder Repair Kit. 3/4 Inch Bore GRK3007

Clutch Master cylinder major Repair kit.

MGB 1962 - 1980.    GRK3007

Use with OE master cylinders only (AHH6553A & AAU7152).

This unit suits a 3/4 Inch Bore Master Cylinder

The piston and seals are 19mm nominal size

OE Master Cylinders are no longer available, they have been superseded by AHH6553 & GMC1007. 

A check can be made by looking at the main piston, if it has a 'Raised Shoulder' on the pressure end, it is designed to take the later type kit GRK3004Z.

If it is 'Flat' across the pressure end, it is designed to use the early type seal kit GRK3007

For the minor repair kit (seals only) see GRK3007Z