LloydDobler
Active member
- Joined
- Mar 14, 2006
- Location
- PDX
On ME7 cars you can't just leave the rear o2 out of the exhaust, you'll throw the code. It senses temp and o2 so if it's not hot it knows it's out of the exhaust. It just needs to sense less o2 than the front one so in a catless system an extender or right angle fitting will allow it to get hot and still read less o2 to avoid throwing a code. Or you can have it deleted by a tuner.
If you want an aftermarket cat, this one passes emissions in Denver, which does the sniffer test and is fairly strict. I have the IPD exhaust and this is what's in it: https://www.amazon.com/dp/B00FG9ORRM/_encoding=UTF8?coliid=I3UPELQOZEIBWB&colid=FLM6O78WZFQ5&psc=0
If you want an aftermarket cat, this one passes emissions in Denver, which does the sniffer test and is fairly strict. I have the IPD exhaust and this is what's in it: https://www.amazon.com/dp/B00FG9ORRM/_encoding=UTF8?coliid=I3UPELQOZEIBWB&colid=FLM6O78WZFQ5&psc=0