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.
Fits perfect and prevents the p0420 code when you add parts that increase flow
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!