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.
Excellent, good delivery and the fitting works as advertised.
Great construction/welds. I purchased this to hopefully avoid a cel when switching to a catless DP. It has been a week, no cel
No more check engine light for catalyst efficiency.
Great. Keeps dtc off for high flow cat like it's supposed to.
Fits perfect and prevents the p0420 code when you add parts that increase flow