Raybestos MC390224 Professional Grade Brake Master Cylinder

The Raybestos MC390224 is a Professional Grade Brake Master Cylinder from Raybestos' Element3 line — engineered to give technicians a new part that fits each application as well as the original. Manufactured from precision castings, this master cylinder delivers an exact match to your OE design in both form and function, ensuring reliable, consistent braking performance.

Key Features:

• OE-Matched Casting Material: Raybestos matches the original equipment casting material — aluminum or cast iron — for a precise, application-specific fit
• Single-Bore, Dual Hydraulic Channel Design: Mirrors the original equipment configuration for proper brake force distribution
• 4-Outlet Design: Features four outlets with M10 x 1.0 port sizing for correct hydraulic circuit connections
• Stock Bore Size: Maintains factory brake bias and pedal feel
• Power Brake Compatible: Designed to work seamlessly with power brake booster systems; reduced-weight casting design does not stress the brake booster mounting
• Ready to Install: Comes pre-assembled and ready to bench bleed — no additional assembly required
• Reservoir & Float Switch Included (Where Required): Complete kit includes reservoir and float switch matched to the specific application
• 100% Pressure Tested: Each unit is pressure tested in both hot and cold environments to ensure leak-free performance
• Built for Longevity: Constructed with the highest-quality components for long service life

Raybestos has been a trusted name in braking since 1902, offering over 1,600 replacement master cylinder models covering vehicles from 1947 and up. The MC390224 meets or exceeds OE fit, form, and function standards — making it the ideal direct replacement for a confident, safe brake system repair. Includes cross-reference part number PL19914.