There are two versions: there is a thread in one that can thread into your factory o2 bung and be turned 180 degrees to clear the car, or there is a weld in version.
This will remove the o2 sensor from the direct exhaust flow path and reduce the chance of throwing a Check Engine Light for installing a high flow cat.
By running the rear o2 this will keep the car from running the catalyst test mode and reducing your highway MPGs.
United StatesThe item seems to doing its job. Installation seemed relatively easy. We had to loosen up some braces to help with the installation, though. After installation the setting of it in the right angle or position in order to clear things with the O2 sensor was a minor concern. So far we have not had the code show up.
United StatesInstalled with mid length headers, with 400 cell cat in the down pipe. I got a CEL, saying slow response for the first week, then it went away. Not sure whether the ECU adjusted for it or it said screw it, its fine, but just beware this is also made by a different company, ZZP just lists it, so don’t go to them if you have issues, I’m leaving it on for now if/until it becomes an issue. Gotta pass the emissions though.
United StatesGreat addition to the ZZP downpipe and cat to ensure less chance of a check engine light. I enjoy installing these quality parts on my cobalt, I get great results and I dont go broke!
United StatesInstallled this along with the ZZP downpipe on my 2019 Sonic RS and haven’t thrown any trouble codes. It was a tight fit during the install but can be done without unbolting the rear of the resonator pipe.
