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Titanium is a very poor conductor of heat, and reduces the heat transfer by approximately 90%
The standard aluminum brake pistons are light but very heat conductive which means the thermal energy from the brake pad transfers easily to the brake fluid.
The castellated contact edge promotes airflow into the piston cavity and reduces the contact surface with the pad and thus further decreases heat transfer to the brake fluid.
We designed using advanced engineering simulations (FEA) to achieve the same weight than their aluminum counterparts while maintaining superior structural strength.
As opposed to stainless steel pistons, our titanium alloy pieces weigh the same as the original aluminum pistons; and they will never corrode and damage the seals causing the caliper to leak.
Price is per pair of pistons
**Please check the piston diameter you need as some calipers take two different sizes. Sizes shown are the piston outer diameter (OD)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
SL-BKP-
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 Front Brake Caliper Seal Kit - M Type caliper
1 kit per caliper - 2 required per car
Restore the performance and reliability of your braking
system with Front Brake Caliper Seal Kit, designed for Porsche 911
models equipped with M Type front brake calipers. This essential brake caliper
rebuild kit contains the seals required to overhaul worn or ageing brake
calipers, helping restore hydraulic efficiency 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 1974-1975 2.7L
Brake caliper seals play a vital role in maintaining hydraulic pressure within the braking system. They prevent brake fluid leakage, protect internal caliper components from contamination and allow the caliper pistons to move correctly during braking. Over time, exposure to heat, moisture, brake fluid and age can cause seals to harden, crack or deteriorate, compromising braking performance and safety.
Replacing worn caliper seals is a key part of brake system maintenance and restoration, particularly on classic Porsche models where original components may have been in service for decades.
What Does a Brake Caliper Seal Kit Do?
A brake caliper seal kit provides the essential sealing components required to rebuild and restore brake calipers. The seals maintain hydraulic pressure behind the caliper pistons while also preventing dirt, moisture and contaminants from entering the caliper assembly.
Correctly functioning caliper seals help provide:
Reliable hydraulic pressure Consistent braking performance Smooth piston operation Protection against brake fluid leaks Reduced internal corrosion Improved caliper longevityWithout effective seals, brake fluid can escape and braking performance may be compromised.
Symptoms of Worn or Failing Brake Caliper Seals
Brake caliper seals naturally deteriorate over time due to age, heat cycles and exposure to brake fluid.
Common symptoms of worn caliper seals include:
Brake fluid leaks around the caliper Soft or spongy brake pedal Reduced braking performance Loss of hydraulic pressure Uneven brake pad wear Sticking or dragging brakes Contaminated brake components Visible cracking or deterioration of seals Corrosion around caliper pistons Increased stopping distancesIn severe cases, seal failure can lead to significant fluid loss and reduced braking safety.
Why Brake Caliper Seal Replacement Matters
Replacing worn brake caliper seals helps restore braking system reliability and prevents more expensive caliper damage.
Benefits of replacing caliper seals include:
Restored hydraulic pressure Elimination of brake fluid leaks Improved braking performance Smoother piston movement Reduced brake drag Improved brake pedal feel Protection against corrosion and contamination Extended brake caliper service lifeFor classic Porsche 911 models, regular caliper maintenance is essential to maintain the precise braking characteristics and safety standards expected from the vehicle.
Features & Benefits
- Suitable for Porsche 911 M Type front brake calipers
- Contains seals required for caliper overhaul and rebuild
- Restores hydraulic sealing performance
- Helps eliminate brake fluid leaks
- Supports smooth piston operation
- Ideal for brake restoration and maintenance projects
- Helps extend brake caliper lifespan
- High-quality replacement sealing components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135196411
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 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