Single Male Banjo Adaptr Bolt M10x1.25 to -4AN

The Single Male Banjo Adaptr Bolt M10x1.25 to -4AN from Vibrant Performance is a precision fluid line adapter engineered for high-performance fuel and coolant system modifications. This adapter serves as a critical interface component in custom engine builds, turbo installations, and fuel system upgrades where OEM banjo bolts require conversion to AN (JIC) fitting standards. Whether you're tuning a track car, installing an aftermarket fuel pressure regulator, or routing braided steel lines through a custom engine bay, this adapter provides the mechanical bridge between metric fastener threads and industry-standard -4AN hose connections.

This banjo bolt adapter features an M10x1.25 male thread on one end, matching common OEM banjo bolt bosses found on cylinder heads, fuel rails, and coolant ports across numerous platforms. The opposite end accepts standard -4AN female ports, allowing seamless integration with aftermarket stainless steel braided hose, remote oil coolers, fuel filters, and turbocharger feed lines. Vibrant Performance's precision machining ensures consistent bore diameter and thread concentricity, critical for maintaining leak-free connections under boost pressure and thermal cycling. The compact 3.54-inch overall length accommodates tight engine bay layouts without requiring additional 90-degree adapters, and the minimal 0.03-pound weight has zero impact on vehicle dynamics or suspension geometry.

Mechanics and fabricators benefit most from this adapter when converting fuel delivery systems on turbo applications, fuel cell installations, or when relocating fuel pressure regulators and dampers away from stock mounting points. Installation requires only standard wrench tools and thread-sealant compound rated for fuel or coolant service. This adapter pairs seamlessly with Vibrant Performance braided hose assemblies (sold separately) and works across domestic and import platforms that use M10 banjo bolt fasteners—from LS-engine swaps to Honda K-series builds. Proper torque specifications and thread sealant application prevent weeping at pressure cycling, ensuring reliability in both street and motorsport environments.