Raybestos MC391211 Element3 Brake Master Cylinder 1.000 in. Bore Aluminum

The Raybestos MC391211 is a brand-new Element3 series brake master cylinder engineered as a direct OE replacement. Constructed from a precision aluminum casting, this master cylinder is designed to match the original equipment fit, form, and function without modification.

Key Features:

• 1.000 in. Bore Size: OE-matched bore size and finish prevents fluid bypass and loss of hydraulic pressure
• Aluminum Construction: Lightweight precision casting reduces stress on the brake booster mounting
• New Piston Assembly and Return Spring: Prevents brake drag, which can overheat the caliper and rotor and reduce pad life
• EPDM and SBR Rubber Components: Meet SAE specifications; compatible with brake fluid and resistant to heat, corrosion, and leakage
• Hardened Zinc Dichromate Bleeder Screws: Trivalent coating provides extra corrosion protection and longer service life
• Power Brake Compatible: Designed for use with power brake booster systems
• Dual Outlets: 2 outlets, each sized at 7/16 in.-24 thread
• SAE Tested: Passes SAE tests for proper function and leak-free operation at both hot and cold temperatures

OEM Cross-Reference Part Numbers: 4877805AA, 4877805AB, 4877805AC, 4877805AD, 4877805AE, 4877805AF, 4877805AG, 4877805AH, 7B0614019, 7B0614019A, 7B0614019C, NM4147, NMC90110, 130.67050, EX0472, M630663, MCA630663

The Raybestos Element3 line delivers a complete new replacement unit — not a remanufactured part — so technicians get a reliable install with fewer comebacks. Sold individually.