When you upgrade to a Flex-A-Fit high-performance, aluminum radiator, you may find that you need to keep track of the engine's coolant temperature. Some factory computers and aftermarket gauges that require attaching a temperature sensor. But instead of drilling into the radiator, you can use one of Flex-A-Lite's In-Line Hose Adaptors. The in-line hose adaptor features a threaded fitting for screw-in style temperature senders and features two 1/4'' NPT threaded ports and a 1/4'' brass plug.