ACDelco 18M1743B Professional Brake Master Cylinder Assembly

The ACDelco 18M1743B is a Professional-grade replacement brake master cylinder assembly engineered to restore reliable hydraulic braking performance. Built using both aluminum and iron castings, this master cylinder delivers the structural integrity and thermal stability needed for consistent, safe braking under demanding conditions.

Key Features:

• SAE J1153 and J1154 compliant — meets established brake performance testing standards for reliability and quality
• Pressure tested prior to shipment to ensure safe and confident braking operation
• Cast iron and aluminum construction — engineered to place no extra stress on the brake booster mounting
• EPDM and SBR rubber internal components — Ethylene Propylene and Styrene Butadiene rubber seals provide superior resistance to heat, corrosion, and fluid leakage
• Precision geometrical tolerances — ensures the cylinder body and plastic reservoir mate correctly for a leak-free fit
• Piston assembly and return spring included — helps prevent brake drag that can accelerate brake pad wear
• Ready to install — bench bleed and install right out of the box with no additional assembly required
• OEM Cross-Reference: 19176353

The ACDelco 18M1743B is a direct-fit, premium aftermarket replacement that meets OE fit, form, and function requirements. It is an ideal solution for restoring factory braking performance without compromise.