Holley EFI 554-121 Air Temperature Sensor – New Other

If you're building a Holley EFI setup, you might need this air temperature sensor, part number 554-121.

It's listed as \new other\—meaning it's unused but maybe the box is opened or it's a factory second.

But mechanically, it's new and ready to install.

It's the sensor that tells your ECU how hot the air is coming in, so it can adjust fuel trim.

Made in the USA by Holley, so you know it's quality.

No warranty, but it's a sensor—if it works, it works.

Grab it for your performance build and get that tune dialed in.