Air Temp Sensor

The HOLLEY Air Temp Sensor (model 534-20) is an electric temperature sending unit designed to monitor intake air temperature in high-performance and modified engine applications. This compact sensor communicates real-time air temperature data to engine management systems, allowing tuners and enthusiasts to optimize fuel mapping, ignition timing, and boost strategies based on actual ambient conditions. Precision air temperature measurement is critical for engines running forced induction, alternative fuels, or custom tune profiles where intake charge temperature directly impacts combustion efficiency and engine safety.

This electric temperature sending unit features a 3/8 inch NPT male thread connection, making it compatible with standard intake manifold or intercooler mounting locations on most LS, small-block, and big-block applications. The sensor's compact 3.55 x 2.7 x 3.8 inch footprint allows discreet installation in confined engine bay spaces without requiring extensive custom fabrication. HOLLEY's proven sensor design delivers accurate temperature readings across a wide operating range, enabling engine control units and aftermarket tuning platforms to adjust fuel delivery and spark advance in real time, protecting against detonation and maximizing power output under varying thermal loads.

Street enthusiasts, drag racers, and performance shops rely on HOLLEY air temperature sensors to safeguard turbocharged and supercharged engines operating at elevated intake air temperatures. Installation requires only standard NPT threading tools and a basic wiring harness connection to the engine controller; most applications integrate seamlessly with existing HOLLEY EFI systems or third-party standalone ECUs. Whether tuning for seasonal ambient changes, high-altitude operation, or extreme boost conditions, this sensor provides the critical thermal feedback necessary for reliable, repeatable performance tuning.