3AN Bulkhead Adapter Black Male Male Straight

The 3AN Bulkhead Adapter Black Male Male Straight by REDHORSE PERFORMANCE is an essential fitting for fuel system and hydraulic line integration in custom engine builds and performance vehicle modifications. Whether you're fabricating a fuel cell installation, upgrading fuel injection lines, or routing custom brake and clutch systems, this bulkhead adapter provides a reliable, leak-free connection point where two male AN-threaded lines need to pass through a firewall, floor pan, or engine bay bulkhead. Mechanics and fabricators rely on bulkhead adapters to create clean, professional-grade plumbing in competition vehicles, turbocharged builds, and street performance applications.

This 3AN male-to-male straight adapter features a precision-machined aluminum body with a hard anodized black finish that resists corrosion and UV degradation in engine compartments exposed to fuel, oil, and extreme temperatures. The straight configuration (zero bend angle) allows dual male AN3 fittings to connect end-to-end through a single bulkhead opening, eliminating the need for separate bulkhead couplers on each side and reducing line clutter in tight engine bays. The compact 2.75-inch length and lightweight 0.06-pound construction make it ideal for weight-conscious builds, while the male-to-male design accommodates both -3 female-threaded line ends without requiring intermediate adapters, simplifying your fuel or hydraulic routing significantly.

This adapter suits EFI fuel system installations, remote fuel cell setups, turbo feed and return line routing, and custom brake/clutch line work on track-focused and street machines alike. Installation requires drilling or enlarging a bulkhead opening to match your line diameter and securing the adapter with appropriate AN port plugs or caps on the engine bay side if lines terminate there. REDHORSE PERFORMANCE fittings meet or exceed SAE J518 standards and are compatible with all -3 AN hose and hard line configurations, making this adapter a universal solution for professional fabricators and serious automotive enthusiasts tackling complete fuel system redesigns.