This air temperature sensor is a direct replacement for Holley Terminator EFI systems, feeding accurate intake air temperature data to the ECU for precise fuel and timing calculations.
Specifications:
- Part Type: Air Charge Temperature Sensor
- Mounting Style: Push-In
- Connector: 2-Pin (connector not included)
- Color: Black
- For Use With: Terminator EFI
- Part Number: 554-121
This is a replacement/service part; the mating connector is sold separately.
FAQ
What does the 554-121 sensor do?
It's a replacement air temperature sensor for Holley Terminator EFI systems that reports intake air temperature to the ECU.
Is the connector included?
No, the 2-pin connector is not included with this sensor.
What style of sensor is it?
It's a push-in style sensor.
What color is the sensor?
Black.

