Str Bulkhead Fitting #4 Black

The FRAGOLA Straight Bulkhead Fitting #4 Black is a precision aluminum hydraulic and fuel line connector designed for high-performance automotive applications, custom engine builds, and competition vehicles. This fitting acts as a crucial junction point in closed-loop fuel systems, brake lines, and coolant circuits where reliable, leak-free connections are essential. It is particularly beneficial for those fabricating custom fuel cell setups or upgrading supercharged engine bays.

Machined from lightweight aluminum with a black anodized finish, this straight bulkhead fitting accommodates -4 AN (5/16-inch) hose and line sizes, which is the industry standard for high-flow fuel delivery in both turbocharged and naturally aspirated performance engines. The straight configuration minimizes unnecessary bends in tight engine compartments, reducing pressure drop and turbulence while simplifying plumbing layouts. FRAGOLA's precision threading and sealed design help prevent leaks under boost and vibration.

This bulkhead fitting is ideal for mechanics and fabricators working on EFI conversions, fuel-injected engine swaps, and aftermarket fuel systems. Its compact profile allows for installation in space-constrained environments without sacrificing durability or flow rate. With its robust construction and reliable performance, it is a must-have for any serious automotive enthusiast.