ACDelco 18M2437B Professional Brake Master Cylinder Assembly

The ACDelco 18M2437B Professional Brake Master Cylinder Assembly is a premium aftermarket replacement master cylinder engineered to restore proper hydraulic brake function. Built to meet expectations for fit, form, and function, this unit is a dependable alternative to original equipment components for a wide range of vehicles.

Key Features:

• Aluminum and iron castings — dual-material construction minimizes stress on the brake booster mounting points
• EPDM and SBR rubber internal components — Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) seals provide superior resistance to heat, corrosion, and fluid leakage
• Precision geometric tolerances — ensures proper mating between the master cylinder body and the plastic fluid reservoir
• Piston assembly and return spring — designed to prevent brake drag that can accelerate premature brake pad and rotor wear
• Bench-bleed ready — pre-assembled and ready to bench bleed and install straight out of the box; no additional assembly required
• Pressure tested — meets SAE J1153 and J1154 brake performance testing requirements for reliable, confident braking

The ACDelco 18M2437B is part of the ACDelco Professional line, offering high-quality aftermarket performance backed by General Motors engineering standards. This master cylinder ships as a complete assembly, simplifying the replacement process.