Bulkhead on the Run Black -4

The ALLSTAR PERFORMANCE Bulkhead on the Run Black -4 is a precision aluminum bulkhead tee fitting engineered for high-pressure hydraulic and pneumatic fluid systems in performance and motorsports applications. This -4 AN (5/16-inch) male bulkhead tee configuration delivers reliable flow distribution across three equal ports, making it essential for engine cooling systems, fuel delivery circuits, and brake line installations where compact, leak-free connections are non-negotiable.

Constructed from aluminum and finished in black anodized coating, this fitting combines lightweight construction with corrosion resistance—critical for both street and race environments where salt exposure, moisture, and temperature fluctuations demand durability. The -4 AN specification supports flows up to standard industry pressure ratings for this size, while the bulkhead design allows secure mounting through firewall or chassis panels without additional clamps or brackets. The three male ports accept standard -4 AN hose ends, adapters, or quick-disconnect couplings, providing maximum system flexibility. Anodized black finish resists oxidation and maintains appearance through extended use and seasonal storage.

This tee fitting is ideal for fabricators, engine builders, and performance shops constructing custom cooling loops, fuel systems, or pneumatic control lines on race cars, hot rods, off-road trucks, and specialty vehicles. It's equally suited for restoration projects where original hard-line routing must be replaced with modern AN plumbing. The bulkhead configuration eliminates the need for external tee blocks, saving underhood real estate and reducing vibration-induced stress on connections—a proven advantage in high-RPM or extreme-terrain applications.