Restore Performance: BM57 Brake Master Cylinder Rebuild Kit
Over time, the seals and internal components of any master cylinder can degrade due to heat and hydraulic pressure, leading to a spongy pedal feel or potential fluid leaks. The HFM.Parts Brake Master Cylinder Rebuild Kit is the most cost-effective solution for restoring your BM57 cylinder to as-new condition.
This comprehensive kit includes all essential replacement parts—premium primary and secondary seals, springs, and internal components—specifically engineered for the 17/16″ (27mm) bore of the HFM.Parts BM57. By replacing these critical wear items, you can restore maximum hydraulic efficiency, eliminate pedal sponginess, and ensure leak-free operation, greatly extending the life of your high-performance cylinder.
Key Advantages & Components
- Complete Restoration: Replaces all critical internal components that degrade over time, restoring the initial firm pedal feel of the Big Bore BM57.
- Precision Fitment: Components are precision-sized to fit only the HFM.Parts BM57 Brake Master Cylinder (17/16″ / 27mm bore).
- High-Quality Seals: Ensures maximum hydraulic pressure is maintained and prevents internal or external fluid leaks.
- Cost-Effective Solution: Avoids the expense of purchasing a completely new master cylinder when only the seals are worn.
Technical Specifications Snapshot
- Compatibility: HFM.Parts BM57 Brake Master Cylinder ONLY
- Bore Size: Restores 17/16″ (27mm) Big Bore performance
- Kit Contents: Includes primary and secondary seals, springs, and pistons.Does not include the proportional valve or oring/seals associated with it. (Exact contents may vary by model, but cover all necessary internal wear parts).
- Restores Performance: Replaces worn seals for a firmer pedal.
- Full Kit: Includes all essential seals, springs, and pistons.
- Specific Fitment: Designed only for the HFM.Parts BM57 model.
- Cost-Effective Repair: Extends the life of your master cylinder.
What's Included
1x Reservoir
2x Reservoir Grommets
1x First piston with rubber cup
1x Second piston with rubber cup
1x Piston Lock Ring
Customer Installs
For R34 GTR – Please refer to FAQ regarding “retaining lock screw”.
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Our compatibility list is based on OEM specifications. Variations may exist due to vehicle sub-models or other factors — verify fitment before purchasing.
On the terminal side, push a small flat screwdriver in between the sensor connector and the bottom of the reservoir to lightly pry apart the lock tab. On the opposite side of the sensor connector, push through to pop it out. *This is much easier to do prior to installation!
Our Story
We weren't always HFM.Parts; we were Holford Motors. Our brand's identity was forged not in an office, but on the local circuits in the high-stress world of competitive drifting. Our ultimate testbed was our Nissan S14 Drift car, driven by champion Luke Fink. Pushing that car to its limits exposed a crucial truth: achieving genuine, repeatable performance meant relying on components that simply weren't available affordably on the market.
The HFM.Parts brand was born
We made the commitment to design and manufacture the uncompromising, high-quality performance parts that we, as competitive racers, demanded ourselves. Every component you see is a solution conceived, tested, and proven by us. When you choose HFM.Parts, you are investing in components engineered by racers, for racers, ensuring your vehicle delivers its maximum performance potential.
Modifying vehicles is a specialist task and requires the knowledge and experience of competent
individuals to
be conducted safely.
We recommend this product be installed by a competent person. Instructions are given with every
order
where
available, however, If you would like a copy prior to ordering, you're welcome to contact us
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