This is the best and cleanest solution for those wanting to use an aftermarket water temperature gauge or for those wanting to use a coolant breather tank. Made out of rigid anodized aluminum, the upper coolant neck adapter incorperates an 1/8" NPT provision for most water temperature senders. Why fuss around with cutting coolant hoses for other style adapters when our adapter places the sensor out of sight leaving the engine bay aesthetically clean? Alternatively, if used with an 1/8" barbed nipple, this adapter can be used as a coolant source for a coolant breather tank. All hardware is included for seamless installation.