Map Sensor - 1 Bar

The Holley Map Sensor - 1 Bar (HLY554-133) is a precision intake manifold absolute pressure sensor designed for high-performance fuel injection systems and engine management applications. This compact sensor measures atmospheric and manifold pressure in real time, enabling your vehicle's engine control unit to calculate the correct air density and optimize fuel mixture ratios across varying altitude and operating conditions. Whether you're tuning a street car, building a race engine, or maintaining an existing fuel-injected platform, this sensor is essential for reliable cold starts, accurate idle quality, and consistent power delivery.

Built by Holley—a leader in fuel injection and engine management—this 1-bar pressure sensor features a 1/8-27 NPT threaded connection for direct mounting to intake manifolds or custom manifold ports. The 1-bar range makes it ideal for naturally aspirated engines and moderate boost applications, providing accurate readings from sea level to elevated altitudes without saturation. The sensor's compact footprint (4.35 x 2.35 x 4.75 inches) and lightweight design (0.28 lbs) simplify installation in tight engine bays while minimizing stress on the manifold port. Holley's engineering ensures durability, repeatability, and integration with their ECU systems and third-party standalone engine computers that recognize standard MAP sensor inputs.

This Map Sensor is ideal for engine builders, performance technicians, and enthusiasts upgrading carburetor engines to modern fuel injection or replacing worn OEM sensors in existing systems. The 1/8-27 NPT thread accommodates most aftermarket manifold designs and Holley fuel injection kits, though buyers should verify port availability and sensor location on their specific intake manifold. Installation requires a simple NPT adapter or direct threaded boss; connect the sensor output to your ECU's MAP input channel for immediate pressure signal feedback. If you're running a Holley EFI system or a compatible aftermarket ECU, this sensor delivers the accuracy needed for proper fuel mapping and engine diagnostics.