ACDelco 18M2426B Gold Brake Master Cylinder Assembly

The ACDelco 18M2426B Gold Brake Master Cylinder Assembly is a premium-quality replacement brake master cylinder engineered to restore safe, reliable braking performance. Built with both aluminum and iron castings, this master cylinder is designed to meet OE-level fit, form, and function standards for GM and compatible vehicles.

The unit arrives pre-assembled and ready for bench bleeding—no additional assembly required—making installation straightforward for professional technicians and experienced DIYers alike.

Key Features:

• Dual-material construction: Aluminum and iron castings provide strength while minimizing weight
• EPDM and SBR rubber components: Ethylene Propylene and Styrene Butadiene rubber seals deliver superior resistance to heat, corrosion, and leakage
• Geometrical tolerance precision: Body and plastic reservoir matched for a proper, leak-free fit
• Optimized piston assembly: Return spring design helps prevent brake drag and premature pad wear
• Pressure tested: Validated for safe and confident braking performance
• SAE certified: Meets brake performance requirements of SAE J1153 and J1154 testing standards
• Bench bleed ready: Ships with bleeder hoses and reservoir cap included—no assembly required
• 2-port configuration: Direct-fit replacement with 2-mounting-hole design
• 24-Month / Unlimited Mile Limited Warranty (Parts Only)

The ACDelco 18M2426B is part of the Gold line—ACDelco's high-quality alternative to OE parts, manufactured to meet the same rigorous General Motors engineering and testing standards. This brake master cylinder is the dependable choice for restoring full braking system integrity.