ACDelco 18M2395B Gold Brake Master Cylinder Assembly

The ACDelco 18M2395B is a Gold (Professional) series brake master cylinder assembly, engineered as a premium aftermarket replacement for a broad range of vehicles. As the hydraulic heart of the braking system, the master cylinder converts pedal pressure into hydraulic force, distributing it to the wheel cylinders and calipers for reliable stopping power.

Key Features:

• Cast Iron and Aluminum Construction: Dual-material castings provide strength and durability while minimizing stress on the brake booster mounting
• EPDM and SBR Rubber Seals: Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) internal rubber components deliver superior resistance to heat, corrosion, and fluid leakage
• Precision Geometric Tolerancing: Ensures the cylinder body and plastic fluid reservoir mate correctly for a leak-free, proper fit
• Piston Assembly and Return Spring: Designed to prevent brake drag, reducing the risk of premature brake pad and rotor wear
• Pressure Tested: Each unit is pressure tested prior to packaging to verify safe and confident braking performance
• SAE Compliant: Meets brake performance requirements of SAE J1153 and J1154 testing standards
• Ready to Install: Pre-assembled and ready to bench bleed straight out of the box — no additional assembly required
• ACDelco Gold Line: High-quality OE alternative backed by General Motors, suitable for GM vehicles and many other makes and models

The ACDelco 18M2395B brake master cylinder is manufactured to meet OE fit, form, and function standards, making it a confident replacement choice. It is backed by ACDelco's 24-Month/Unlimited Mile Limited Warranty (on qualifying purchases). Cross-reference OEM part number: 19295625.