hey lookin to get a air fuel mix gauge...... do the tC's use the wide band or narrow band setup?

 

pretty sure they use a narrow band.

Go with an AEM ugeo setup and have your exhaust shop tap you a second hole

 

you're going to need a wideband gauge... narrowband will do you nothing if you really want to monitor your A/F ratios

and yeah a local exhaust shop should be able to weld another bung on your piping near the stock sensor.. AEM UEGO ftw