Bulkhead Fitting 2 Wire Thru-Wire

The Bulkhead Fitting 2 Wire Thru-Wire (Model EL-AC-166) by ATL Fuel Cells is a precision fuel system component engineered for high-performance and motorsport applications where reliable fuel delivery is non-negotiable. As a mechanic who has overseen countless fuel system builds—from turbocharged street cars to full competition rigs—this bulkhead fitting represents the kind of OEM-grade hardware that separates amateur installations from professional-grade fuel system design. Whether you're fabricating a custom fuel cell, integrating a secondary fuel tank, or upgrading a race vehicle's fuel infrastructure, this thru-wire bulkhead fitting provides the secure, leak-free penetration point your system demands.

ATL Fuel Cells' bulkhead fittings are manufactured to exacting tolerances using aluminum construction that balances weight reduction with durability—critical factors in motorsport where every fraction of a pound affects performance. The two-wire configuration allows independent routing of fuel and return lines (or dual fuel feeds) through a single bulkhead penetration, eliminating the need for multiple holes and reducing potential leak points in the tank wall or fuel cell housing. The thru-wire design ensures positive sealing from both interior and exterior sides, creating a permanent, vibration-resistant connection suitable for high-pressure EFI systems, mechanical fuel pumps, and carbureted applications alike. Compact dimensions (2.5 x 1 x 2.5 inches) and minimal weight (0.03 lbs) make this fitting ideal for weight-sensitive builds without compromising structural integrity or flow capacity.

Professional fabricators, drag racers, circle-track competitors, and street performance builders rely on ATL bulkhead fittings to ensure their fuel systems perform consistently under extreme conditions—high RPMs, fuel starvation scenarios, and rapid acceleration loads. This component is especially valuable when upgrading OEM fuel cells to aftermarket units or designing custom tanks where standard bulkhead solutions fall short. Installation is straightforward: secure the fitting to your tank wall, thread fuel and return lines through both wire connections, and torque to specification for a permanent seal. Compatibility spans virtually all fuel system configurations—carburetors, TPI, LS EFI, modern DPI systems—making it an essential inventory item for any shop handling fuel system modifications or motorsport builds.