Quote Originally Posted by Ford Guy View Post
Summit has sensor, bung and guage for less than $100. I just ordered them for my flathead...just wondering which exhaust to put bung in or can I do both with another bung and sensor?
The bung is usually installed close to the collector, mark the spot where the sensor will fit and be able to be installed and removed in-car (that's kinda important) and drill/weld the bung in.

There are other gauges out there that are dual and run 2 sensors, one on each side, but are more around $300 price range for some reason.

Honestly, once it is set up I wouldn't think you need it, just one more gauge to glutter up the dash and distract you, but it is nice to have