This replacement coolant temperature sensor reports engine coolant temperature to the ECU on Holley Sniper EFI and TBI systems for accurate fuel and idle control. It threads into a 3/8 in. NPT port and ships with pre-applied sealant.

Holley 543-120 Features:

• Direct replacement sensor for Holley Sniper EFI and TBI systems.
• Brass sending unit with 3/8 in. NPT threads.
• Single-pin connector.
• Pre-applied thread sealant for a leak-free install.
• Operating range of -40 to 135 deg C.