invidia / cobb sensors?

I notice the cobb dp has 2 sensor hookups and invida v2 /v3 seem to only have 1 ...

is there some welding involved for hookup on an 06 sti for invidia?

 

This was taken from Cobb's downpipe "MORE INFO" tab:

In addition, an auxillary O2 sensor bung is located near the turbo in a position that's easy-to-reach from the engine compartment for wide-band O2 sensor use during tuning sessions

 

so it's only used to aid in tuning the car, and not something thats stock?

thats what I was thinking, but wanted to make sure I wasn't missing something.

 

its a bung. lots of exhausts have them. you can add a sensor if you want, if not, then just leave it alone. If you want to run a permanent wideband 02 sensor its a good place to put it.

 

If u have an A/F Gauge you could just buy a Wideband 02 sensor and screw it in and it will work fine...

 

Bump for that. Its far easier to just leave the bung plug in than have to drill and weld the invidia if you want a wideband.

 

how bad is the smell from catless vs cat?

 

Almost none from my experience....

 

depends on how rich your car runs. I can smell my car, but not others.

 

good stuff, thanks guys