When plumbing a high-performance race car, the most common hurdle is connecting standard engine ports to modern racing hoses. Most engine blocks, fuel pressure regulators, and oil galleries utilize 1/8" National Pipe Thread (NPT), while professional-grade braided lines utilize the AN (Army-Navy) 37° flare standard. The Longacre 45240 Straight Adapter is the precision bridge between these two worlds.
This fitting is essential for hooking up oil pressure gauges, fuel pressure senders, or remote nitrous lines. Machined from high-strength aluminum and finished in a signature blue anodize, it provides a leak-free transition that withstands the high vibration and extreme pressures found in a racing environment. Its compact, straight-through design ensures maximum flow with a minimal footprint in crowded engine bays.
Key Features
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Leak-Free AN 37° Flare: Features a precision-machined #4 AN (Dash 4) male flare, designed to provide a metal-to-metal seal with braided stainless steel or PTFE lines without the need for messy thread tape on the AN side.
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Standard 1/8" NPT Base: Equipped with a 1/8-inch male pipe thread, the universal standard for oil and fuel pressure ports on almost all American and imported racing engines.
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High-Strength Billet Aluminum: Machined from premium aluminum for a lightweight yet incredibly durable fitting that won't crack under the stress of high-pressure hydraulic systems.
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Blue Anodized Finish: The durable anodized coating protects against corrosion from racing fuels, oils, and engine coolants while providing the classic professional look found in top-tier pit boxes.
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High-Pressure Reliability: Specifically engineered for racing applications, ensuring the fitting remains secure even under intense engine harmonics and thermal expansion.
