309 Master Cylinder - The Supercar Registry

01-11-2009, 12:20 AM

Mr70

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Re: 309 Master Cylinder

Those were used on 1969 Firebirds w/power front disc brakes & rear drum.
Master cylinder casting #5468309,actual factory part #5469357
Coded GA
Primary piston has shallow push rod hole
Secondary piston identification has 3 rings
Bore diameter is 1.125"
Distribution 69/31
Port location/routing front-front/rear-rear
Port sizes front 1/2"x20,rear 9/16"x18
Line wrench size front and rear 9/16"

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