1/16NPT Male to 4AN Male Vac/Boost Reference

The 1/16NPT Male to 4AN Male Vac/Boost Reference adapter from REDHORSE PERFORMANCE is an essential component for any serious engine builder, tuner, or mechanic working with forced induction systems and precision fuel management. This fitting bridges the critical gap between your boost or vacuum signal source and aftermarket gauges, fuel pressure regulators, or engine management systems that rely on AN-port connections. Whether you're dialing in a turbocharged setup, installing a carbureted fuel system with vacuum-referenced regulation, or adding diagnostic instrumentation to monitor boost stability, this adapter ensures reliable pressure signal transmission without compromise.

Constructed with REDHORSE's proven aluminum and stainless steel construction, the 1/16NPT Male to 4AN Male fitting delivers corrosion resistance and durability in both underhood heat and extended storage. The 1/16 NPT (National Pipe Thread) inlet accepts OEM-style pneumatic signals directly from your intake manifold, supercharger outlet, or factory vacuum source, while the 4AN outlet threads cleanly into 4AN-ported equipment without requiring additional adapters or step-down fittings. The tight thread engagement on both ends eliminates the risk of signal loss, vacuum leaks, or boost creep caused by loose or mismatched port connections—critical factors when tuning boost targets or regulating fuel pressure under transient conditions.

This adapter is indispensable for carbureted turbocharged builds, aftermarket fuel regulators, and gauges that require a reliable boost or vacuum reference signal. Its compatibility with various systems makes it a versatile choice for any performance application. By ensuring a secure connection and accurate signal transmission, this adapter helps you achieve optimal performance in your engine tuning and management efforts.