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.
Let's talk bout the shipping, it took a while to get here over 5 days from initial delivery date, but thats not zzp fault they went ahead and mailed it the next day it was usps fault. Going forward, the quality if this is amazing, i thought it looked good in pictures but in person its such a better and nicer looking piece definitely appreciate it! It works like a charm, if you going straight pipe no cats this is a must or ull have to live with the ******* check engine like, over all awesome! Will continue to purchase from ZZP no dought! Highly recommended!
Bought this for my catted down pipe i only used the straight part of the o2 **** extender. Works amazing. Sounds amazing .
The part definitely had some weight and good quality to it. Had a P0420 code and this fixed the problem.
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.