Just curious, but I've seen aftermarket cats for the 996tt from time to time that have a third hole (usually plugged with some kind of cap or bolt), in addition to the two o2 sensor holes. Just curious what the purpose of the extra hole is. Some sort of additional sensor? Thanks!

 

Yep probably provisions for a wideband

 

Aw, that makes sense. Thanks!

 

I was about to say, this title should have had NWS until I read the question.

 

ohhhhhh man

 

Makes sense but the 996 uses a wideband for the factory o2 sensor.

 

for exhaust temp or wideband

 

....to **** on my rug and make my house reek!! Oh..wait, wrong cat. My wife's cat is pushing my urge-to-kill-meter to redline.

 

Well, it must be a female.

 

Kicked the wife's cats out of house 2 years ago... They still stare in the windows and get fed 2x a day, but no longer pissing on the bed!

 

So the dog can get to the "other side"

 

Exhaust Gas Temp.