O2 Bung Extender


We do not recommend running without the rear o2 sensor because it could run the rear o2 test and reduce your gas mileage.








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Ordered the Turbo Back Kit for my 2020 Sonic RS and threw it on and as expected the check engine light came on. Ordered this, installed it in 5 min and after driving it for a day or two the check engine light went off!
Worked well. Originally I installed the ZZP catted downpipe and the O2 sensor was smashed up against the heat guard wall which caused the wires to be exposed and short out causing CEL. Installed this item and wrapped the wires. Works perfect now and no CEL. Product works great and easy to install. Only thing is they should recommend this with the downpipe initially. Would have saved me from removing and installing downpipe twice. But ZZP puts out great quality products.