so I'm installing my test for today and I'm wondering if this will O2 sensor spacer will work

 

Also I heard that once it's on you smell straight fumes on the cabin

 

threads look different. fine vs coarse. whatever the case you could probably crank it in there

 

The exhaust will smell a tad more because you're removing the cat, but it's not going to stink up the cabin. The O2 sensor spacer I have is about twice as long as that one and it works very well. They can be had from RAI, 034, and eBay

 

I put a test pipe on a few days ago (to attempt to diagnose a clogged high-flow cat) and this morning with the driver window halfway down I definitely smelled exhaust when stopped at a light. But then again, my car creates more exhaust than yours does most likely, due to upgraded turbo and fueling.

 

metal man is the smell unbearable and is the o 2 sensor spacer too small? BTW it fits perfectly. I just don't want it to be a gas chamber inside you know its an audi

 

Make sure you use anti-seize between the spacer and the bung and the sensor and the spacer.

 

OK thnx cca. Someone told me that the hole is too small in the spacer for it to work

 

Just to be clear, you're planning to put that spacer at the downpipe-end of the test pipe, not the turbo-end of the test pipe, right?

You can always try it out, won't hurt anything. The worst that will happen is you'll get a CEL light for the post-cat O2 sensor.

 

Test pipe is in the hard part was the bottom side as for the spacer it went perfect just had to drill a bigger hole in the spacer and no CEL