Hi Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
So, today, I disassembled my front brake calipers (One of the casting # E64326816 left side.) 1970 E-Type Series 2. The new pistons in the rebuild kit from a major supplier matches the part # from several other suppliers. #64325434 SS the small outboard pistons. They measure 1.500 inch. The large inboard piston measures 2.1225 inch.
The issue is: Small bore in caliper is 1.595 - 1.600; and large bore is 2.252 inch. The seals in the kit match the small pistons, not my calipers. I am assuming, someone before me installed the calipers with larger pistons. Could they be from a Series 3? Maybe an XJ6?
The issue is: Small bore in caliper is 1.595 - 1.600; and large bore is 2.252 inch. The seals in the kit match the small pistons, not my calipers. I am assuming, someone before me installed the calipers with larger pistons. Could they be from a Series 3? Maybe an XJ6?