Please be assured that this slave cylinder is NOT an incorrect V4/V6 1" bore unit stainless re-sleeved down to 7/8". The new'Lucas' clutch master cylinder has the original correct. 70" internal bore diameter, with the correct 7/16" outlet port thread size. It is fitted with a new genuine'GIRLING' alloy filler cap as original. Produced by classic Girling & AP Lockheed specialist suppliers - Powertrack Ltd Tel: 01344 886522.