Brake master cylinder 1970 Cutlass

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Apr 11, 2024 | 06:12 PM

rfpowerdude

Thread Starter

Registered User

Joined: Apr 2013

Posts: 640

From: Palm Bay, Fla

Brake master cylinder 1970 Cutlass

I want to make sure I get the correct one. Power drums front/rear. Is the Duralast NM1489 correct for my application? Looks right but the description makes me wonder. Is the correct OE number 18030255?

I am getting close to full reassembly and firing it up.

Apr 12, 2024 | 06:24 AM

joe_padavano

Old(s) Fart

Joined: Mar 2007

Posts: 50,829

From: Northern VA

5471817 is the original number. If you don't care about being optically correct (as in, no bleeder screws) then yes, that Duralast will work fine. OEM was a 1" bore.