 The 20.5mm 911 Master Cylinder Myth Proven, A Real Factory 1969 Part |
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| 914Sixer |
 Dec 29 2025, 05:47 PM
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#1
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914 Guru  Group: Members Posts: 9,379 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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Found this and passing info on. I have one of the 20mm on the 1975. Never could prove it was a factory part. Article clears up myth that the larger master cylinder came from Mercedes.
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| sixnotfour |
Dec 29 2025, 06:46 PM
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#2
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914 Wizard Group: Members Posts: 11,075 Joined: 12-September 04 From: Life Elevated..planet UT. Member No.: 2,744 Region Association: Rocky Mountains 
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no myth, just NLA
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| 914Sixer |
Dec 29 2025, 07:06 PM
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#3
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914 Guru Group: Members Posts: 9,379 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Not totally true, I have a 2nd one that is NOS.
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| Ninja |
Dec 29 2025, 08:16 PM
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#4
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Member Group: Members Posts: 61 Joined: 25-September 25 From: Granbury Texas Member No.: 29,004 Region Association: Southwest Region |
What calipers are you running Mark?
That looks like a good MC size for Boxster calipers. I wish they were more readily available. Have you researched what the NOS one you have is worth to the 911 crowd? |
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