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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)
SIZE 38mm diameter x 29mm height
Porsche OE numbers 90135299300, 90135209911, 93035155104,
Please check your caliper pistons size before ordering, this list below is just a guide
Porsche 911 1969-83 Rear
Porsche 911 2.7 Rear
Porsche 911S Rear
Porsche 911L Rear
Porsche 930 Front
Porsche 911 1974-83 Rear
Porsche 911 1984-89 Rear
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135299300
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
SIZE 42mm diameter x 30mm height

Please check your caliper pistons size before ordering, this list below is just a guide
Porsche 911 1984-89 REAR
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135242X00
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
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
SIZE 48mm diameter x 30mm height

Please check your caliper pistons size before ordering, this list below is just a guide
Porsche 911 1977-89 FRONT
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135142500
The product you are viewing cross references to these numbers
- 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
SIZE 48mm diameter x 34mm height
Porsche OE numbers 91135191800
Please check your caliper pistons size before ordering, this list below is just a guide
Porsche 911 1969-77 Front
Porsche 911 1974-83 Front
Porsche 911 1984-89 Front
Porsche 911 S Front
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135191800
The product you are viewing cross references to these numbers
Price is for each Piston
*** Please check the piston diameter you need as some calipers take two different sizes. Sizes shown are the piston outer diameter (OD), The height of the pistons is 32mm
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1055955
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
- 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 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
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.