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- Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
High Temperature Performance Brake Caliper Seal Kit
Upgrade Kit 34mm
1 kit per caliper - 2 required per car
Upgrade and restore your Porsche braking system with this
High Temperature Performance Brake Caliper Seal & Piston Upgrade Kit, specifically engineered for selected Porsche 981 Boxster/Cayman, 718
Boxster/Cayman, 997 and 991 models.
Fits:
- Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Part of the advanced Performance Range, this premium brake
caliper rebuild kit combines replacement pistons with upgraded high-temperature
sealing components to deliver enhanced durability, reliability, and braking
consistency under demanding driving conditions.
Please
verify piston diameter before ordering.
Kit Contents
• 2 x 34mm Pistons
• 2 x 34mm Performance Dust Seals
• 2 x 34mm Performance Piston Seals
• 2 x Bleed Nipples
• 2 x Bleed Nipple Dust Covers
Designed for fast road driving, spirited use, track-day events, and performance-focused Porsche ownership, this kit helps maintain optimum caliper performance when subjected to repeated heavy braking and elevated operating temperatures.
Unlike conventional rebuild kits, the Performance Range incorporates upgraded silicone dust seals and enhanced thermal-resistant piston seals specifically developed to withstand the extreme temperatures generated by modern high-performance braking systems.
Performance Range Key Advantages
High-Temperature Silicone Dust Seals
Performance Range kits utilise premium silicone dust seals instead of traditional OEM-style EPDM rubber dust boots.
Benefits include:
• Exceptional resistance to elevated brake temperatures
• Improved flexibility during repeated thermal cycles
• Increased durability under demanding braking conditions
• Reduced risk of heat-related seal degradation
• Enhanced protection against dirt, moisture, and contamination
Enhanced Thermal-Resistant Piston Seals
The piston seals are manufactured using an upgraded EPDM compound developed specifically for high-performance braking applications.
Advantages include:
• Increased resistance to high operating temperatures
• Improved sealing performance under heavy braking loads
• Enhanced long-term reliability
• Greater resistance to thermal fatigue
• Consistent caliper performance during demanding use
Why Choose the Performance Range?
Modern Porsche sports cars are capable of generating extremely high braking forces, particularly during spirited driving and track use. Standard caliper seals can deteriorate more rapidly when repeatedly exposed to elevated temperatures.
The upgraded materials used throughout the Performance Range help maintain brake caliper efficiency and sealing integrity when exposed to:
• Repeated heavy braking cycles
• High operating temperatures
• Fast road driving
• Track-day environments
• Motorsport-inspired applications
• Performance driving conditions
This makes the kit an ideal preventative maintenance upgrade for Porsche owners seeking enhanced brake system durability and performance.
Ideal Applications
Perfect for:
• Porsche 981 Boxster & Cayman
• Porsche 718 Boxster & Cayman
• Porsche 997 Carrera & Turbo models
• Porsche 991 Carrera & Turbo models
• Fast road driving
• Track-day use
• Motorsport-inspired builds
• Brake caliper refurbishment projects
• Vehicles subjected to repeated heavy braking cycles
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
997403673
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
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Rear Brake Caliper Seal Kit
1 kit per caliper - 2 required per car
Premium rear brake caliper seal kit designed for
Porsche 928 S4, 928 GTS, 928 GT, and Porsche 944 turbo models up to VIN 95KN1
00218. This comprehensive kit includes seals for the two piston sizes to suit the rear
caliper configuration, ensuring correct fitment and reliable performance.
Fits:
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Please
verify piston diameter before ordering.
The kit contains
2 x 30mm piston dust covers
2 x 28mm
piston dust covers
2 x 30mm piston seals
2 x 28mm piston seals
2 x bleed
nipple covers
Engineered to OEM standards, these components ensure proper hydraulic sealing, protect against dirt and moisture ingress, and support smooth piston movement for consistent braking performance. Ideal for maintenance, repair, or restoration of Porsche braking systems.
Key Features
• Designed for Porsche 928 & 944 turbo rear calipers
• Maintains hydraulic pressure and piston protection
• Prevents contamination and corrosion
• OEM-quality materials for durability and reliability
Function and Purpose
This seal kit is essential for maintaining rear brake caliper performance and safety.
It helps to:
• Seal brake fluid within the caliper
• Protect pistons from dirt, debris, and moisture
• Maintain consistent braking pressure
• Ensure smooth and balanced piston movement
• Prevent corrosion and internal damage
Why Replace Rear Caliper Seals
Brake seals degrade over time due to heat, pressure, and exposure to the elements.
Common issues include:
• Brake fluid leaks
• Reduced braking efficiency
• Sticking or seized pistons
• Uneven brake pad wear
• Corrosion caused by moisture ingress
Replacing worn seals restores braking performance, safety, and reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
951009228
The product you are viewing cross references to these numbers
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Rear Brake Caliper Piston and Seal Kit
1 kit per caliper - 2 required per car
Comprehensive rear brake caliper piston and seal kit designed for Porsche 928 S4, 928 GTS, 928 GT, and Porsche 944 turbo models up to VIN 95KN1 00218. This complete rebuild kit includes both pistons and sealing components, making it ideal for restoring full braking performance.
Fits:
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Please
verify piston diameter before ordering.
Kit contains
2 x 30mm caliper pistons
2 x 28mm caliper pistons
2 x 30mm piston dust covers
2 x 28mm piston dust covers
2 x 30mm piston seals
2 x 28mm piston seals
2 x bleed nipples and covers.
This ensures full compatibility with the rear caliper configuration and enables
a complete overhaul.
Manufactured to OEM standards, this kit restores hydraulic integrity, ensures smooth piston operation, and protects against contamination—delivering reliable and consistent braking performance. Ideal for restoration, maintenance, or professional brake system rebuilds.
Key Features
• Rear brake caliper piston and seal kit
• Designed for Porsche 928 & 944 Turbo rear calipers
• Complete rebuild solution for performance restoration
• OEM-quality materials for durability and reliability
Function and Purpose
This complete kit is essential for restoring rear brake caliper performance.
It helps to:
• Replace worn or corroded pistons
• Restore hydraulic sealing within the caliper
• Maintain consistent braking pressure
• Ensure smooth piston movement and operation
• Protect internal components from dirt and moisture
Why Replace Pistons & Seals Together
Over time, both pistons and seals wear due to heat, pressure, and corrosion.
Common issues include:
• Brake fluid leaks
• Seized or sticking pistons
• Uneven braking performance
• Corrosion on piston surfaces
• Reduced braking efficiency
Replacing both pistons and seals ensures a complete and long-lasting repair.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
951908228
The product you are viewing cross references to these numbers