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- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
Rear Brake Caliper Piston and Seal Kit
1 kit per caliper - 2 required per car
Complete rear brake caliper piston and seal kit designed specifically for Porsche 993 turbo and Carrera 4S models. This all-in-one rebuild kit includes pistons and sealing components required to restore full braking performance and reliability.
Fits:
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
Kit contains
4 x 28mm caliper pistons
4 x 28mm piston dust caps
4 x 28mm piston seals
2 x bleed nipples and covers
Manufactured to OEM standards, this kit ensures proper hydraulic sealing, smooth piston operation, and long-term durability. Ideal for maintenance, restoration, or professional brake system rebuilds.
Key Features
• Rear brake caliper piston and seal kit
• Designed for Porsche 993 turbo & Carrera 4S rear calipers
• Complete rebuild solution with pistons and seals
• Maintains hydraulic pressure and performance
• OEM-quality materials for durability and reliability
Function and Purpose
This complete kit is essential for restoring rear brake caliper function.
It helps to:
• Replace worn or corroded pistons
• Restore hydraulic sealing within the caliper
• Maintain consistent braking pressure
• Ensure smooth and even piston movement
• Protect internal components from contamination
Why Replace Pistons & Seals Together
Brake components degrade over time 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 reliable repair.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
993910228
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Related, superseded, cross reference or alternative numbers for comparison.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
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
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