BBP 7877 Rear Disc Brake Caliper Piston - Phenolic

The BBP 7877 is a rear disc brake caliper piston constructed from phenolic resin material. This replacement piston is designed to restore proper brake caliper function during caliper rebuilds and brake system overhauls.

Key Features:

• Phenolic resin construction provides thermal insulation properties
• Reduces heat transfer from brake pads to brake fluid
• Corrosion-resistant material that will not rust
• Direct replacement for rear disc brake calipers
• Designed for caliper rebuild applications

About Phenolic Pistons:

Phenolic brake caliper pistons are manufactured from a durable plastic composite material that offers specific advantages in braking applications. The phenolic material acts as a thermal barrier, helping to prevent heat from transferring into the brake fluid which can contribute to brake fade under heavy use. Unlike metal pistons, phenolic pistons are naturally corrosion-resistant and will not rust or corrode when exposed to moisture. These pistons should always be replaced when rebuilding brake calipers to ensure proper brake system performance and safety.

Installation Notes:

When replacing caliper pistons, it is essential to use the correct piston type for your specific caliper design. Always replace caliper pistons in pairs (both left and right sides) and ensure brake pads are compatible with phenolic piston applications. New caliper seals and boots should be installed during piston replacement.