Bulkhead Adapter 90 Degree Elbow -12AN

The Bulkhead Adapter 90 Degree Elbow -12AN (SKU VIB10613) is a critical plumbing component for high-performance fuel, coolant, and hydraulic systems in custom automotive builds. This adapter bridges two 12AN male connections through a bulkhead wall or firewall with a 90-degree angle, allowing mechanics and fabricators to route lines efficiently in tight engine bays where space is constrained. If you're upgrading a fuel system for forced induction, converting to fuel injection, or building a custom cooling loop, this fitting ensures leak-free pressure retention while maintaining clean line routing.

Machined from aluminum and finished in black anodize, the Bulkhead Adapter 90 Degree Elbow -12AN resists corrosion and delivers durability in underhood and firewall environments where moisture and heat accelerate oxidation. The 90-degree elbow geometry eliminates the need for multiple fittings and hose sections, reducing connection points and pressure drop—a key advantage when system flow rates matter. The 12AN size (3/4-inch SAE) handles flows up to 250+ gallons per hour at safe pressures, making it suitable for fuel systems, transmission coolers, and intercooler setups on naturally aspirated and turbocharged engines alike. Black anodize finish integrates seamlessly with modern engine bay aesthetics while protecting against galvanic corrosion.

This 90-degree bulkhead adapter is ideal for builders running aftermarket fuel rails, remote oil coolers, or dual-pass radiator systems where line entry angles demand precision fitment. Installation requires matching 12AN hose ends or AN fittings on both sides; ensure your hose crimps and fittings are rated for system pressure (typically 40–100 psi for fuel, higher for hydraulics). Compact dimensions (4.53 x 1.5 x 5.91 inches, 0.22 lbs) allow flexible mounting in confined spaces behind shock towers, along frame rails, or through firewall penetrations. Compatible with any -12AN fuel system components—from carbureted to fuel-injected platforms—this adapter is a staple for street, bracket, and show vehicles requiring clean, professional hose routing.