This K-Tuned fitting will replace the OEM Idle Air Assist Valve normally found on K20A/A2/A3/Z1 engine's water neck, giving you the perfect location to mount the coolant temp sensor

The coolant temp sensor must be added when performing a K-swap into any EF/EG/EK/DA/DC2 vehicle in order for the analog temp gauge to work and read accurately on the instrument cluster of these 'legacy' vehicles.