Rear Brake Caliper Piston Dust Cap and Seal Kit. Porsche 928 S4 / 928 GTS / 928 GT / 944 turbo  ❭  951009228

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

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.