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Dorman - First Stop Brake Master Cylinder P/N:M39438
$269.99
Build the hydraulic pressure that operates the brakes with the Dorman - First Stop Brake Master Cylinder M39438, a direct-fit replacement for the 1984 Chevrolet Corvette [All]. When you press the pedal, this master cylinder converts that force into hydraulic pressure and sends it through its four outlets to the vehicle's brake circuits, using a dual reservoir to feed two separate circuits.
- 100% new: made entirely of new materials, not remanufactured.
- Aluminum housing: constructed to match the casting material of the original part for similar performance.
- Durable design: the rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Strict specifications: made to meet SAE International standards, and precision-engineered to match the design, function, and performance of the original unit on the listed application.
Key specs: 0.813 in bore diameter, 4 outlets, and 2 mounting holes. The rearward outlet is M12 x 1.0 and the secondary outlet thread is M10 x 1.0, with a 1 mm primary outlet thread pitch. Includes the master cylinder cap and reservoir. It does not include a sensor, bleeder hoses, push rod, brake booster, mounting hardware, or a mounting bracket — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
Interchange: 174-836 · 174836 · 18M231 · 83-36058 · 8336058 · M900431 · 100-2274 · 1002274 · M-82058 · M82058 · 12010 · 13-4004 · 134004 · 10-4003 · 104003 · 130.62058 · 13062058 · MC507210 · 355-47061 · 35547061 · 14046850 · M4003 · NM4003 · MC39438 · F107748 · MC107748. Manufacturer part number M39438.
This part cross-references / interchanges with the following part numbers:
174-836, 18M231, 83-36058, M900431, 100-2274, M-82058, 12010, 13-4004, 10-4003, 130.62058, MC507210, 355-47061, 14046850, M4003, NM4003, MC39438, F107748, MC107748
Frequently Asked Questions
What vehicle does this master cylinder fit?
It's a direct-fit replacement for the 1984 Chevrolet Corvette [All]. Check the Buyer's Guide tab to confirm it matches your vehicle before ordering.
What does a brake master cylinder do?
When you press the brake pedal, it converts that force into hydraulic pressure and sends it through its outlets to the brake circuits. Its dual reservoir feeds two separate circuits.
What's included with M39438?
The package contains one master cylinder with its reservoir and cap. It does not include a sensor, bleeder hoses, push rod, brake booster, mounting hardware, or a mounting bracket.
What is the bore diameter and how many outlets does it have?
It has a 0.813 in bore diameter and 4 outlets. The rearward outlet is M12 x 1.0 and the secondary outlet thread is M10 x 1.0, with a 1 mm primary outlet thread pitch.
What are signs the master cylinder may need replacing?
Signs may include a pedal that slowly sinks under steady pressure, a spongy pedal, or brake-fluid loss. Diagnose the cause first, since these symptoms can have other sources.
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Dorman - First Stop Brake Master Cylinder P/N:M39438
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