Fuel Filter End Cap -6

The Fuel Filter End Cap -6 by ALLSTAR PERFORMANCE is a precision-engineered adapter designed for high-performance fuel system installations where reliability and flow integrity are non-negotiable. Built for enthusiasts and mechanics who demand professional-grade components, this end cap serves as a critical connection point in custom fuel filtration setups, allowing seamless integration between -6 AN fuel lines and standard filter housings. Whether you're building a race engine fuel system, upgrading a street performance vehicle, or establishing a clean fuel supply for fuel injection tuning, this aluminum end cap ensures leak-free operation under pressure.

Machined from aircraft-grade aluminum and finished in black anodize, the Fuel Filter End Cap -6 features a 6 AN male thread on one end and a 1-13/16-20 inch male O-ring thread on the other, providing dual compatibility with both modern AN-spec fuel lines and traditional spin-on filter housings. The O-ring sealed design eliminates the risk of fuel seepage at the connection point, critical when pressures exceed 60 PSI or when running aggressive fuel injection systems. Black anodized finish provides corrosion resistance in engine bay environments and maintains aesthetic consistency with other performance fuel system components. The compact footprint (4 x 1.9 x 7.05 inches, weighing just 0.16 lbs) minimizes space requirements in tight engine compartments common to forced induction and LS-based builds.

This end cap is ideal for builders transitioning from factory fuel systems to aftermarket solutions, particularly those installing in-line fuel filters in carbureted restorations, EFI conversions, or motorsports applications. Mechanics and fabricators appreciate the dual-thread design for its flexibility—it bridges the gap between -6 AN braided line standards and legacy filter head threads without requiring adapters or custom fabrication. Proper installation requires hand-tightening the O-ring connection until snug, then backing off slightly to allow the O-ring to seat; over-torquing will damage the seal and compromise system integrity, a common oversight that this design prevents through its forgiving geometry.