AFR guage

I just checked it out on Summit's website. Man those instructions are ridiculously complex. For my intended use it appears that i just need to weld in the bung, hook up the gauge and go. ....I think.

power wire and ground and that's it. Make sure you install the bung at an angle so the condensation does not sit on the 02 sensor. Next your ready for tuning and then you have a peace of mind knowing how your motor is operating