Big End Performance 20007 Brass Disc/Drum Brake Proportioning Combination Valve

The Big End Performance 20007 is a brass disc/drum brake proportioning combination valve designed for vehicles with front disc and rear drum brake configurations. This universal GM-style valve is engineered to regulate hydraulic brake pressure, preventing rear wheel lockup and ensuring balanced braking performance across your entire brake system.

Key Features:

• Durable solid brass construction for long-lasting reliability and corrosion resistance
• Built-in safety switch that detects pressure loss or imbalance in the brake system
• Five-port configuration with dual 3/8"-24 outlets for front brakes and single 9/16"-18 outlet for rear brakes
• Inlet ports sized at 1/2"-20 and 7/16"-24 to accommodate GM-style dual-bowl master cylinders
• Versatile mounting options: works as left mount, right mount, or bottom mount
• Natural brass finish for professional appearance
• Includes dash warning light connector for brake system monitoring

This proportioning valve is essential when upgrading to a dual-bowl master cylinder or converting from drum to disc front brakes. The integrated safety switch monitors brake system pressure and automatically cuts off fluid supply to any defective circuit, preventing complete brake failure and allowing you to safely stop your vehicle. Ideal for GM cars and trucks, street rods, muscle cars, and classic vehicle restoration projects.