ABC Dynamics Brake Master Cylinder with Pushrod – 3/4″ Bore for Power Brakes (Replaces 29891-C)

ABC Dynamics: Precision Parts for Uncompromising Performance.

Restore the reliable stopping power of your **vehicle’s power brake system** with this brand new, precision-engineered **M7616652 Master Cylinder** from **ABC Dynamics**. Designed as a perfect replacement for casting number **29891-C**, this unit is critical for safe operation in **classic trucks, muscle cars, and light commercial vehicles** running power assist brakes. Don’t compromise on safety—trust ABC Dynamics for quality you can feel with every stop.

Key Specifications & Expert Features

• System: **Power Brake Application ONLY** (Critical for safety)
• Bore Size: **3/4″** bore (Critical for achieving correct pedal ratio with a power booster)
• Outlet Sizes: **9/16″-18** and **1/2″-20** (Standard thread sizes for dual-line GM systems)
• Pushrod: Unit **includes a new pushrod** for simplified installation.

Verified Casting & Part Numbers

This master cylinder is a confirmed replacement for the following casting numbers, commonly found on older **Chevy, GMC, and specialty vehicles**. Matching your existing casting number to the list below ensures you get the right part every time:

• **29891-C** (Primary)
• 5470819
• 5470876
• 5470878
• C5470878
• C5470876

Expert Note: Power Brake Systems and Pedal Feel

Quality Brake and Clutch Components from ABC Dynamics

ABC Dynamics Part Number: M7616652

View Installation Guide