Product Description
Hydrovac – Frame Mount, Single Diaphragm
Part Number(s)
2512065, 2512065X
Description
This Hydrovac unit is a single diaphragm, frame-mounted brake booster designed for heavy-duty vehicle applications—commonly used in GM trucks. It provides consistent, vacuum-assisted braking power with durable internal components and precision-engineered fittings. Engineered to meet OEM specs, it features a compact profile with rugged performance and an MB-1 mounting bracket for secure frame installation.
Specifications
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Diameter: 12-3/4"
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Overall Length: 18-5/8"
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Input Port: 5/16" IF
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Output Port: 5/16" IF
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Air Cleaner Port: 1/2"
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Vacuum Supply Port: 1/2" IF
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End Cap: H
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Mounting Bracket: MB-1
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Mount Type: Frame Mount
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Diaphragm Type: Single
Sold As
Remanufactured – Core charge applicable (refunded upon receipt of good core; see core policy)
Cross-Reference(s)
2512065X, 15618301, 2503139, 2504304, RV2512065X, ZZRV2512065X, 2508827, 2512064, 2512065, 5396-RV2512065X, 767653032146, HDX RV2512065X, MBIRV2512065X, MIDRV2512065X
Important Installation Notes
✔ Match bracket (MB-1) to vehicle chassis before install
✔ Inspect all ports (input, output, vacuum) for proper thread engagement
✔ Bleed system after installation per OEM brake spec
✔ Return undamaged core to redeem core refund
✔ Ensure diaphragm type matches existing system
