BLACK LS Engine Fuel Pressure Adapter Fitting 4AN Female Flare to 1/8 NPT. AN Female to NPT Female LS Engine Fuel Pressure Adapter Fitting. Connect your fuel line to your fuel. Cell or tank with these high quality fuel cell bulkhead adapters. These double anodized and hand polished. Aluminum adapters won’t restrict fuel flow and come complete with two PTFE washers. Fitting Size: – 4AN to 1/8 NPT. Made of High Quality Materials. Easy To Use. Flexible Couplings are engineered to isolate vibration generated by the engine, thereby relieving stress on your vehicle’s exhaust system. They will reduce premature cracking of manifolds and down pipes and help extend the life of other components. Turbo Flex Coupling features an internal Stainless Steel Interlock Liner to facilitate smooth flow of high temperature exhaust gases. Recommended for all high flowing, high temperature applications e. Flex Couplings with Inner Braid Liner provide laminar flow while retaining flexibility in the coupling itself. The Inner Braid protects the Bellows from premature failure, and is ideal for eliminating exhaust “whistle”. We Will Only Accept Our Products Which Are Unused, Unwrapped Or Never Installed.