Repair kit to rebuild the clutch master cylinder on MG1100 and Austin America models. The MG1100 and Austin America both used the same clutch slave cylinder as the classic Mini, but they had different master cylinders compared to the (classic) Mini. This was because the pedal stroke was different so the bore was adusted to a smaller .70" bore diameter. Ref: GRK3005, 51105, LK10716.