Gauge fitting questions TD42i

[Cuppa]

Adaptors would work but the correct fitting comes with the gauge - may as well use it.

Thanks, but the point is my new exhaust already has a threaded pyro fitting (steel) welded into the dump pipe but with a larger diameter (¼”) than the Autron/Redarc sensor (⅛”).

No idea if the 4.2 has a factory boost sensor to piggy back off (but I doubt it).