MAP Sensor Port Cover

The HOLLEY MAP Sensor Port Cover (HLY300-251) is a precision male push-lock fitting designed to seal or block unused manifold absolute pressure sensor ports. This component is ideal for mechanics and enthusiasts who are building custom engines, upgrading fuel management electronics, or consolidating sensor configurations to prevent vacuum leaks and unwanted air ingestion at the intake manifold.

Engineered for durability, this port cover features a robust male push-lock design that seats securely in stock or aftermarket intake manifold ports without requiring additional fasteners or clamps. Its compact form factor allows it to fit tight spaces within typical engine bay layouts while maintaining a low profile. HOLLEY's manufacturing standards ensure consistent bore sizing and material integrity, preventing port separation under boost or vacuum cycling conditions.

Whether you're tuning a carb-to-EFI conversion, installing a standalone ECU, or consolidating sensor wiring on a race engine, this HOLLEY port cover plugs empty MAP ports cleanly and reliably. It pairs naturally with HOLLEY fuel injection systems, aftermarket manifolds, and custom engine configurations where OEM sensor ports no longer serve a function, making it a versatile choice for various applications.