Master Cylinder 1967-68 Pontiac & SHALLOW Booster Pin Type - 1" - Drum/Drum 66-68 era * READ

This is important if you have a BUICK, Caddy or PONTIAC Full size USA made car with factory  DRUM Front DRUM Rear car of the following with power booster.. the PIN coming out of the power booster.. going INTO the DIMPLE in the back of the piston of the  master cylinder the booster pin being about 1/2" /  13 mm roughly . The Alternative size is about 32mm.  For DRUM Front and Drum rear ONLY.

IF you have the same models but short pin.. its an alternative booster used on the same era and has a DEEP Dipple in the back of the masters piston.. then look at # PW2607J

Fitted to the following cars but NOT .. NOT.. any Chevy.