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O2 Bung Extender

Exhaust - O2 Bung Extender
Exhaust - O2 Bung Extender
This will reduce the chance of getting a CEL for running a high flow cat in your car. It is made from Stainless steel, has straight and a 90 degree bend so you have two options for a more indirect flow of exhaust gasses to the rear o2 sensor. The 90 degree extender angle is adjustable so it can fit in any position.
We do not recommend running without the rear o2 sensor because it could run the rear o2 test and reduce your gas mileage.
Exhaust - O2 Bung Extender
Exhaust - O2 Bung Extender
Customer Reviews
5.0 Based on 54 Reviews
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United States United States
2002 MC SS Dale Earnhardt Edition O2 extension

Installed the straight O2 extension to help ensure we got no codes on my wifes car from the installation of the ZZP 2.5" catted downpipe. No codes after several test runs and one test drive. As usual with ZZP products this product is quite incredible in appearance and craftsmanship. Heck I wanted to install the angled extension simply because it looked so good, but all I needed was the straight extension. Noticable power increase with the 2.5" catted DP and front PLOG on N/A 3800.

ZZPerformance O2 Bung Extender ReviewZZPerformance O2 Bung Extender Review
Christopher C.
United States United States
08 Chevy Cobalt

I had replaced stock catalytic convertor with high flow cat. had a p2270 code after installed O2 **** extender and resolved issue

Tyler B.
United States United States
Gets rid of codes

Got rid of the codes being thrown. Would recommend.

Ronald G.
United States United States

Excellent, good delivery and the fitting works as advertised.

United States United States
Solid Product

Great construction/welds. I purchased this to hopefully avoid a cel when switching to a catless DP. It has been a week, no cel