LS cylinder heads are machined with metric M12-1.5 coolant sensor ports,This adapter allows you to keep your original sensors and integrate them into your swapped LS engine. I would suggest measuring the length of your sensor before purchasing this adapter.
Adapter has a female 1/8-27" NPT tapered pipe thread port.Works great to get a coolant temp gauge,Do not have to modify to fit temperature sensor!
Larlansz Precision threads never leaked or stripped any threads when installing.Must for aftermarket gauges