LS Engine Fuel Pressure Adapter Fitting

The LS Engine Fuel Pressure Adapter Fitting by Vibrant Performance is a precision-engineered component designed for builders and technicians working with LS-based fuel systems. This straight adapter fitting bridges the gap between modern fuel pressure sensors, gauges, and custom fuel rail configurations where standard factory ports don't align with aftermarket plumbing. Whether you're tuning a carbureted restomod, upgrading to an LS swap in a classic car, or installing a standalone ECU system, this adapter solves real-world manifold pressure distribution challenges that arise during complex engine modifications.

Constructed from lightweight aluminum with black anodized finish, the LS Engine Fuel Pressure Adapter Fitting features a 4 AN female port on one end and a 1/8 inch NPT female port on the other, allowing seamless integration of both metric and imperial fuel system standards. The black anodized coating provides corrosion resistance and a professional appearance under the hood while maintaining durability in high-vibration engine bays. At just 0.02 lbs, this compact fitting adds negligible weight to your fuel system while maintaining structural integrity under full fuel pressure loads, making it ideal for both street and racing applications where every gram counts.

LS engine enthusiasts benefit most from this adapter when installing aftermarket fuel pressure regulators, gauge feeds, or turbo boost reference lines that require precise port locations. Installation is straightforward—apply appropriate thread sealant to NPT connections and tighten firmly using wrenches on both hex surfaces to prevent leaks under operating pressure. This fitting is compatible with all LS-based engines (LS1, LS2, LS3, LS7, and variants) and works seamlessly with popular fuel systems from companies like Holley, AEM, and Mighty Mouse. Keep one in your tech kit for emergency fuel system repairs or have multiples on hand for complex custom builds.