You're right Corbin, the Probe does have a 1/8 NPT. At least that what it says. But you lost me a bit when you said the "first time" you had someone weld the bung, then the next time you just tapped it. I'm guessing that you just welded a bung to your non-turbo manifold the first time you installed the EGT, and then this time with the turbo manifold, you just tapped into the manifold with a 1/8" NPT tap and that allowed you to just "Screw/ratchet" the 1/8 NPT EGT probe in to the tapped hole, am I right here?

Thanks as always for the answers Corbin!

Jason
98' Eagle Talon ESi-T
Mitsu Super 16g Turbo(HRC)


http://springfielddsm.homestead.com/JasonsPics.html

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Jason ESi-T

04' BMW 325Ci
91' Nissan 240SX
98' Eagle Talon ESi (sold)