Add to Cart
The item has been added
Dorman - First Stop Brake Master Cylinder P/N:M39621
$249.99
Convert brake-pedal force into hydraulic pressure for the brake circuits with the Dorman First Stop Brake Master Cylinder M39621. It installs as a direct-fit replacement for the 1986-1987 Chevrolet Corvette [All], delivering fluid to the system each time you press the pedal.
- 100% new: built entirely from new materials, not remanufactured, for consistent quality and safety.
- Aluminum housing: the cylinder housing is cast to match the casting material of the original part for similar performance.
- EPDM rubber components: the rubber parts use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Made to SAE standards: produced to meet rigorous SAE International specifications.
This unit has a 0.875 in bore diameter, three outlets, and two mounting holes, with a rearward outlet size of M12 x 1.0 and a secondary outlet thread of M10 x 1.0. It ships with a single reservoir and the master cylinder cap. Mounting hardware, mounting bracket, sensor, push rod, brake booster, and bleeder hoses are not included — consult the vehicle service information for the correct fasteners and any additional parts. Country of origin: Taiwan.
Interchange: 174-830 · 174830 · 18M343 · 83-36063 · 8336063 · M900549 · 100-3012 · 1003012 · M-82063 · M82063 · 12188 · 13-4001 · 134001 · 10-4001 · 104001 · 130.62063 · MC507780 · 355-47062 · 35547062 · 10052280 · M2188 · NM2188 · MC39621 · F115610 · MC115610
This part cross-references / interchanges with the following part numbers:
174-830, 18M343, 83-36063, M900549, 100-3012, M-82063, 12188, 13-4001, 10-4001, 130.62063, MC507780, 355-47062, 10052280, M2188, NM2188, MC39621, F115610, MC115610
Frequently Asked Questions
Will this master cylinder fit my vehicle?
It is a direct-fit replacement for the 1986-1987 Chevrolet Corvette (All). Check the Buyer's Guide tab to confirm it matches your specific vehicle.
Is this a new or remanufactured master cylinder?
It is 100% new, made entirely of new materials and not remanufactured, to help ensure consistent quality and safety.
What's included with this master cylinder?
It includes a single reservoir and the master cylinder cap. Mounting hardware, mounting bracket, sensor, push rod, brake booster, and bleeder hoses are not included.
What are the bore and outlet specs?
The bore diameter is 0.875 in with three outlets. The rearward outlet size is M12 x 1.0 and the secondary outlet thread is M10 x 1.0.
Do I need to bleed the system after installing it?
Follow the vehicle service procedure for bleeding the brakes after installation. If a failed master cylinder is the cause of a low or soft pedal, this replaces it; diagnose the cause first.
Write a Review
Dorman
Dorman - First Stop Brake Master Cylinder P/N:M39621
Related Products
Add to Cart
The item has been added
Dorman - First Stop Brake Master Cylinder P/N:M630301
This brake master cylinder is precision-engineered to match the design, function, and performance of the original master cylinder on specific vehicle years, makes and models. It is made of new,...
$127.99
Add to Cart
The item has been added