Combination Valve Disc/ Drum

The ALLSTAR PERFORMANCE Combination Valve Disc/Drum (ALL 41040) is a critical hydraulic component engineered for vehicles requiring split brake circuit architecture. This brass combination valve integrates the functions of a proportioning valve, metering valve, and warning switch into a single compact unit, directing brake pressure appropriately to disc front brakes and drum rear brakes. The natural brass finish resists corrosion while maintaining reliable pressure modulation across differing brake pad and shoe friction coefficients.

This combination valve addresses a fundamental braking system requirement: disc and drum brakes respond differently to hydraulic pressure due to their mechanical design differences. Without proper proportioning, the rear drum brakes would lock prematurely, causing instability and reduced stopping efficiency. ALLSTAR's combination valve automatically meters pressure to the rear circuit, preventing wheel lockup while maximizing braking power at the front. The integrated warning switch triggers a dashboard indicator if pressure is lost in either circuit—critical feedback for safety-conscious operators. Brass construction provides durability across temperature cycles common in both street and track applications.

Buyers restoring or upgrading classic vehicles with mixed brake systems—whether muscle cars, trucks, or vintage platforms—depend on this component to balance braking performance. Hot rod builders, restoration shops, and serious enthusiasts specify ALLSTAR combination valves when converting older drum-only systems or maintaining original disc/drum configurations. Installation requires standard plumbing fittings and integration into the brake line network between the master cylinder and wheel circuits.

ALLSTAR PERFORMANCE holds a strong reputation in the performance brake and suspension community for manufacturing components that meet or exceed OEM specifications while remaining cost-effective for DIY and professional builders alike.