- Cooling, AC & Heating
- Thermostat Housings, Filler Necks & Water Restrictors
- Holley Water Necks
Thermostat Water Neck Upgrades for Your Custom Application
Holley offers replacement Water Necks for many vehicle variations and engine swap applications. These water necks are available in standard and swivel configurations for custom setups and add a show-quality appearance to your engine bay.
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