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Caliper Seals |Pistons
By OE Match
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
This brake caliper seal kit is designed to rebuild the front brake calipers of classic Porsche 911 models (1974-89) (non-turbo). It includes all the sealing rings, dust boots, and fasteners necessary to rebuild a single caliper, ensuring proper hydraulic sealing, piston movement, and reliability. Manufactured to original Porsche specifications.
Sold per caliper

Porsche 911 1974 - 1989
• Position on Vehicle: Front axle brake calipers, service train of the front brake system.
• Applications: Ideal when the original caliper pistons or seals have been serviced, when you observe brake lever/root pressure changes, when brake fluid contamination has occurred or during a full caliper rebuild.
The sealing components within a brake caliper are critical to safe and effective braking performance. Worn or damaged seals can lead to piston sticking, brake drag, uneven pad wear, reduced braking efficiency or fluid loss. Replacing with a correctly specified rebuild kit restores hydraulic integrity, ensures smooth piston operation and helps maintain your 911’s original braking feel.
When and why to replace:
• Caliper pistons are sticking or moving unevenly.
• Visible damage to dust boots or signs of fluid leakage around the caliper.
• Uneven pad wear or brake performance inconsistency.
• During brake pad or rotor replacement when calipers are open.
• High-mileage vehicles or cars where original seals have not been replaced.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135194600
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)


Porsche 911 >>1969
Now you can restore your brake calipers performance with our Rebuild Kits. Each kits includes the necessary seals and dust covers that you will need for the rebuild process. Sold per caliper.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135296411
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Repair kit designed to rebuild the rear brake calipers of classic Porsche 911 models from the 1969–77. This kit includes all necessary sealing rings, dust boots and associated hardware required to restore proper hydraulic operation and sealing integrity of the “M-type” steel calipers.
Sold per caliper.

Porsche 911 1969-77 REAR.
"M" type The S calipers are aluminium and the M calipers are steel
• Position: Rear axle brake caliper assembly—used to rebuild one caliper (sold each).
• Applications: Ideal for use when calipers show signs of leakage, piston sticking, seal degradation or during full brake system overhaul/restoration.
Brake caliper seals and boots are crucial for maintaining hydraulic function, preventing fluid leaks and ensuring piston mobility. When seals wear out, you may experience brake drag, uneven pad wear, reduced stopping performance or fluid leakage. Replacing with a correctly specified kit ensures safe, consistent braking under all conditions.
When and why to replace:
• Visible brake fluid leakage around the caliper body or piston boot.
• Caliper pistons sticking or uneven pad wear.
• Brake overhaul where pistons are removed and seals are exposed.
• Restoration of vehicles where the original seal kit has not been replaced in decades.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135299800
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
OE Match rear brake caliper seal repair kit designed to service the rear brake calipers on classic Porsche 911 (1974–1983) models. Now you can restore your brake calipers performance with our Rebuild Kits. Each kits includes the necessary seals and dust covers that you will need for the rebuild process.
Sold per caliper.

Porsche 911 1974 - 1983
The brake caliper seal kit replaces the internal piston seals, dust boots, and associated rubber components within the rear brake caliper. These seals perform essential functions:
• Maintain brake fluid integrity inside the caliper piston bore
• Prevent fluid leakage under hydraulic pressure
• Protect internal components from dirt, moisture, and debris
• Enable smooth piston movement for consistent brake pad engagement
• Help ensure even pad wear and reliable stopping performance.
Over time, original caliper seals harden, crack, or lose elasticity, which can lead to leaking, sticking pistons, uneven braking, and reduced safety.
Function
• Hydraulic sealing: Ensures brake fluid stays within the caliper bore
• Piston movement control: Allows smooth, controlled piston travel
• Dust and dirt exclusion: Prevents contaminants from entering the caliper bore
• Brake performance preservation: Helps maintain even pad engagement and return.
A properly rebuilt caliper with new seals helps restore brake responsiveness and reduces the risk of brake drag or uneven braking at the rear wheels.
Brake caliper seals are critical for hydraulic braking performance and safety. Old seals often suffer from: • Hardening and cracking due to heat and age • Swelling or deformation from fluid contamination • Loss of elasticity, causing piston bind or leak paths • Corrosion of caliper bores when moisture enters through failed dust boots Worn or leaking seals result in reduced brake performance, fluid leakage, uneven pad wear, brake drag, and compromised stopping power. Replacing them with an OE Match seal kit restores proper fluid retention and piston mobility - increasing safety, consistency, and brake system longevity. When to replace. Install this rear brake caliper seal kit when: • Calipers are leaking fluid around the piston area • Brake pistons stick or bind, causing brake drag • You are performing a full caliper overhaul • Pads and rotors are replaced and calipers are difficult to service • Dust boots are torn, brittle, or missing. A seal kit is a core part of brake caliper rebuilds and should be considered whenever the caliper is disassembled.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135299800
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
This OE Match-standard brake caliper seal repair kit is engineered as a direct-fit replacement for the rear brake caliper sealing components on classic Porsche 911 models. This kit supplies the essential gaskets, seals and dust boots needed to rebuild the brake caliper’s sealing surfaces accurately.
Sold per caliper.

Porsche 911 1984-89 (Rear)
This kit is sold on a per-caliper basis - for reconstructing or refreshing one rear brake caliper’s internal seals and dust protection.
In a brake caliper, seals and dust boots play a critical role in maintaining hydraulic integrity and protecting internal components from dirt and moisture. Over time seals can harden, crack or shrink, leading to fluid leaks, reduced braking performance, and uneven pad wear. This kit provides the correct rubber components to refresh the caliper sealing surfaces, allowing pistons to move freely while maintaining fluid pressure and protecting against contamination.
Function
• Hydraulic Seal Function: Prevents brake fluid leakage from the caliper piston bore under pressure.
• Dust Protection: Dust covers keep contaminants out of the caliper internals, reducing corrosion and wear.
• Restore Performance: Helps return caliper piston travel and braking response to as-designed levels.
• Durability: rubber materials resist heat, fluid exposure and aging typical of high-stress brake system environments.
Brake caliper seals and dust boots wear with age and use. When the seals degrade, brake fluid can leak at the caliper piston, reducing hydraulic pressure, degrading braking performance, and potentially causing uneven pad wear or pulling under braking. Dust boots that are cracked or missing allow grit and moisture into the caliper bore, accelerating corrosion and piston binding. Replacing these with an OE Match kit helps restore correct brake function, maintain consistent pedal feel, and extend the life of your brake calipers.
Replace the brake caliper seal kit if you notice:
• Brake fluid leaks around the caliper piston seal.
• Spongy or inconsistent brake pedal feel.
• Uneven pad wear or reduced braking performance.
• Cracked, hardened or missing dust covers.
• During a full brake overhaul or rebuild.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135290500
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Rear Brake Caliper Piston & Seal Kit
1 kit per caliper - 2 required per car
High-quality rear brake caliper piston and seal kit designed for classic Porsche 356B, 356C, 912, and early 911 2.0ltr models.
This complete rebuild kit restores braking performance, hydraulic sealing, and
smooth piston operation for rear brake calipers fitted with 35mm pistons.
Fits:
- Porsche 356B 2000 GS Carrera 2
- Porsche 356BC 1600
- Porsche 356BC 1600 SC
- Porsche 356BC 2000 GS Carrera 2
- Porsche 356BB 2000 GS Carrera 2
- Porsche 356BC 1600
- Porsche 356BC 1600 SC
- Porsche 356BC 2000 GS Carrera 2
- Porsche 911 2.0ltr
- Porsche 912 1.6ltr
Kit contains
- 2 x 35mm caliper pistons
- 2 x 35mm piston dust caps
- 2 x 35mm piston seals
- 2 x bleed nipples with covers
Manufactured to OEM specifications, these components ensure precise fitment, reliable hydraulic sealing, and long-term durability. Ideal for classic Porsche restoration projects, brake servicing, or preventative maintenance.
Key Features
• Rear brake caliper piston and seal kit
• Designed for 35mm rear brake caliper pistons
• OEM-quality materials for reliability and durability
• Restores hydraulic sealing and piston movement
• Ideal for classic Porsche brake rebuilds
• Suitable for restoration and maintenance projects
Function and Purpose
This kit is essential for maintaining rear brake caliper performance.
It helps to:
• Restore smooth piston operation
• Maintain correct hydraulic pressure
• Prevent brake fluid leaks
• Protect pistons from dirt and moisture
• Ensure safe and consistent braking performance
Why Replace Brake Pistons & Seals?
Brake caliper components wear over time due to age, moisture, and heat.
Common issues include:
• Corroded or sticking pistons
• Perished seals and dust caps
• Brake fluid leaks
• Reduced braking efficiency
• Uneven braking performance
Replacing pistons and seals restores reliability, safety, and original braking feel.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
356946235
The product you are viewing cross references to these numbers
-
disc brake front axle 911 SC 1978-83 602-00
-
disc brake rear axle 911 SC 1978-83 603-00
-
brake front axle 911 CARRERA 1987-89 602-00
-
brake rear axle 911 CARRERA 1987-89 603-00
-
brake front axle 911 CARRERA 1984-86 602-00
-
Disc brake rear axle 911 CARRERA 1984-86 603-00
-
Disc brake front 911 1974-77 602-00
-
Disc Brake Rear, Handbrake 911 1974-77 603-00
-
Disc brake rear 911 UPTO 1968 603-00
-
disc brake rear, handbrake 911 TURBO 1975-77 603-00
OEMatch Caliper Seals |Pistons — Stopping Power, Consistent Control
OEMatch caliper seals and pistons for Porsche models restore hydraulic integrity and consistent brake response. These restoration and repair components are practical alternatives when genuine or OEM parts are unavailable, offering direct-fit replacements engineered to match original-spec dimensions and tolerances. OEMatch maintains extensive cross-references to support model-specific servicing.
Available Types
- Seal kits — piston seals and dust boots
- Replacement pistons — steel and phenolic options
- Rebuild kits including seals, pistons and associated fittings
Understanding OEMatch Caliper Seals |Pistons
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche's original caliper seals and pistons. OE (Original Equipment) refers to parts matching original specifications for the caliper seals and pistons and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM caliper seals and pistons engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Caliper pistons convert hydraulic pressure into pad clamping force while seals retain fluid and exclude contamination. Correct materials, surface finish and seal geometry reduce the risk of corrosion, piston scoring and sticking. Components listed here are chosen to address common Porsche service needs and to support caliper rebuilds across different models.
Benefits Include
- Restores hydraulic integrity to prevent leaks and maintain consistent pedal feel
- Improves caliper response and even pad wear
- Reduces corrosion and fluid-related deterioration
- Supports reliable retraction and balanced braking across wheels
Why Caliper Seals |Pistons Wear and Fail
- Aging and brake fluid degradation that harden or swell seals
- Corrosion and pitting on pistons from moisture ingress
- Heat damage from sustained or aggressive braking
- Contamination or debris causing seal abrasion and piston scoring
The Importance of Replacing with OEMatch Caliper Seals |Pistons
Worn seals and pistons compromise braking performance and can lead to leaks, uneven braking or sticking calipers. Replacing these parts restores consistent system pressure, pedal feel and safety-critical function; selecting components matched to Porsche specifications helps maintain correct clearances and long-term reliability without altering system behaviour.
Advantages
- High-quality materials chosen for corrosion and fluid resistance
- Made to original-spec dimensions and tolerances for Porsche models
- Suitable for restorations, routine servicing and caliper rebuilds
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and replace fasteners where specified. If you lack the correct tools or are unsure about hidden sensors or required recalibration, seek professional installation.