Well, I guess I have to go with JBA. I'd love to get a pair of their titanium ceramic headers, but I have one concern. I need to tig weld a stainless steel bung into the header directly after the collector. This bung will house an O2 sensor for my wideband AFR meter. I'm worried that welding this stainless to a titanium coated stainless will be a problem. Can anyone offer feedback about whether or not this can be done? If so, how?

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*95 T100, 4WD, EXTCAB, SR5, 5spd, 2.5 mm bored throttle body, Kumho Venture MT, Bilstein HD, TRD SC, URD Performance Upgrade Kit, 2" body lift, TRD headers coming soon
*06 Toyota Rav4 269HP 4wd V6

Amsoil in all