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- 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
Front Brake Caliper Seal Kit for S Type Calipers - 1 kit per caliper - 2 required per car
Maintain safe, reliable and responsive braking performance
with Front Brake Caliper Seal Kit, designed for Porsche 911 models
equipped with S Type front brake calipers. This comprehensive seal kit contains
the essential sealing components required to rebuild and restore original brake
calipers, helping preserve hydraulic pressure and ensuring consistent braking
performance.
Fits:
- 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
Brake caliper seals are critical components within the braking system. They seal the hydraulic fluid behind the caliper pistons, allowing braking pressure to be applied efficiently while protecting internal components from dirt, moisture and corrosion. As seals age, they can become brittle, worn or damaged, leading to fluid leaks, sticking pistons and reduced braking performance.
Replacing worn caliper seals is an important part of Porsche brake maintenance and restoration, particularly for classic 911 models where preserving original braking components is often preferred.
What Does a Brake Caliper Seal Kit Do?
A brake caliper seal kit provides the replacement seals required during a brake caliper rebuild. These seals maintain hydraulic integrity within the caliper and ensure the pistons operate smoothly under braking pressure.
A properly rebuilt caliper helps provide:
Consistent hydraulic pressure Reliable braking performance Smooth piston movement Protection against fluid leaks Reduced risk of internal corrosion Extended brake caliper service lifeWithout effective seals, brake fluid can escape and braking efficiency can be significantly reduced.
Symptoms of Worn or Failing Brake Caliper Seals
Brake caliper seals are constantly exposed to heat, pressure and brake fluid. Over time, the sealing material can deteriorate and lose its ability to maintain proper hydraulic pressure.
Common symptoms of failing caliper seals include:
Brake fluid leaks around the caliper Soft or spongy brake pedal Reduced braking performance Loss of hydraulic pressure Sticking or seized pistons Uneven brake pad wear Brake drag Corrosion around piston surfaces Increased stopping distances Visible deterioration of seals during inspectionIf ignored, worn seals can lead to more extensive caliper damage and compromised braking safety.
Why Brake Caliper Seal Replacement Matters
Replacing worn brake caliper seals is one of the most effective ways to restore braking performance and preserve valuable original brake calipers.
Benefits of replacing caliper seals include:
Restored hydraulic efficiency Elimination of brake fluid leaks Improved braking response Better brake pedal feel Reduced brake drag Protection against corrosion Extended caliper lifespan Improved braking safety and reliabilityFor classic Porsche 911 models fitted with S Type calipers, regular caliper maintenance helps preserve the vehicle's original braking characteristics and driving experience.
Features & Benefits
- Suitable for Porsche 911 S Type front brake calipers
- Contains seals required for brake caliper rebuilds
- Restores hydraulic sealing performance
- Helps eliminate brake fluid leaks
- Supports smooth piston operation
- Protects against moisture and contamination
- Ideal for brake restoration and maintenance projects
- Helps extend brake caliper service life
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135199800
The product you are viewing cross references to these numbers
Price is each seal
**Please check the piston size you need as some callipers take two different sizes.
Fits:
Various Models
Price is each seal
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1055955
The product you are viewing cross references to these numbers
Brake Caliper Replacement Pistons for Brembo Calipers
Sold each
Restore the performance and reliability of your Porsche Brembo braking system with these OE Match Brake Caliper Replacement Pistons. Manufactured to original equipment specifications, these precision-engineered pistons are designed for rebuilding Brembo brake calipers fitted to a wide range of Porsche models.
Available in 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm and 44mm outer diameters, every piston has an overall height of 32mm and is manufactured to deliver the correct fit, smooth operation and dependable sealing performance when used with new piston seals and dust boots.
Important: Please check the piston diameter required for your specific caliper before ordering. Many Brembo calipers use two different piston diameters within the same caliper to optimise braking performance. The sizes listed refer to the outer diameter (OD) of the piston.
What Does a Brake Caliper Piston Do?
The brake caliper piston is one of the most important components inside the braking system. Hydraulic brake fluid pressure pushes the piston forward, forcing the brake pad firmly against the brake disc to generate the friction required to slow or stop the vehicle.
Its primary functions include:
- Converting hydraulic pressure into braking force.
- Applying even pressure across the brake pads.
- Ensuring smooth and consistent piston movement.
- Maintaining balanced braking performance.
- Supporting Porsche ABS and stability control systems.
- Delivering precise pedal feel and braking response.
Correctly functioning pistons are essential for maintaining the powerful, progressive braking performance expected from Porsche Brembo calipers.
Why Do Brake Caliper Pistons Fail?
Brake caliper pistons operate in harsh conditions and are continually exposed to heat, moisture and brake dust. Over time they can become damaged or worn.
Common causes include:
- Corrosion caused by moisture ingress.
- Torn or damaged dust boots.
- Contaminated brake fluid.
- Surface pitting.
- Heat generated during heavy braking.
- Seized pistons caused by corrosion.
- Damage during previous repairs.
- High mileage and normal wear.
A damaged piston can prevent the caliper from operating correctly, leading to reduced braking performance and uneven brake pad wear.
Symptoms of a Worn or Damaged Caliper Piston
Common symptoms include:
- Sticking or seized brake calipers.
- Uneven brake pad wear.
- Vehicle pulling during braking.
- Reduced braking performance.
- Overheating brakes. Brake drag.
- Fluid leaks around the piston seal.
- Difficulty retracting the piston during servicing.
Replacing damaged pistons during a caliper overhaul restores smooth operation and reliable braking performance.
When Should Brake Caliper Pistons Be Replaced?
Replacement is recommended whenever:
- Corrosion or pitting is visible.
- Pistons become seized or difficult to move.
- The caliper is being rebuilt.
- Dust boots have failed allowing contamination.
- Brake fluid leaks occur around the piston.
- Uneven pad wear is caused by sticking pistons.
- Restoring older Brembo brake calipers.
- During preventative maintenance on ageing braking systems.
For the best results, new pistons should always be installed with new piston seals and dust protection boots.
OE Match Quality You Can Trust
These OE Match Brake Caliper Replacement Pistons offer:
- Manufactured to original equipment specifications.
- Precision-machined finish.
- Excellent corrosion resistance.
- Smooth piston movement.
- Direct replacement fitment.
- Suitable for Brembo brake calipers.
- Available in 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm and 44mm diameters.
- Uniform piston height of 32mm.
- Ideal for professional caliper rebuilding.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1055955
The product you are viewing cross references to these numbers
DOT 4
Having an extremely high boiling point and lower viscosity than required, it meets and greatly exceeds regulatory standards. Also suitable for vehicles with ABS.
Vapour Lock formation
This sort of habit leaves room for the Vapour Lock, the formation of vapour bubbles due to boiling of the brake fluid that replace the normal fluid and are compressed, thereby sending the brake pedal to its fill stoke (spongy pedal). The origin is incident in the porosity of the tubes that make up the braking circuit, which in time draw moisture into the fluid, drastically reducing the boiling point. The result is a reduced braking efficiency.
Brembo Premium Brake Fluid
Brembo Premium brake fluids have a higher boiling point that exceeds the standard, thus offering superior resistance to the Vapour Lock and ensuring braking efficiency even at low temperatures. With high anti-corrosion properties and resistance to oxidation, Brembo brake fluid also allows for long-term unaltered chemical/physical characteristics of the fluid in operating circuit; therefore, preserving its integrity.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
L040
The product you are viewing cross references to these numbers