- Reviews
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- O2 sensor
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Love the sound. It did not come with a gasket. Was told by customer service to use high temp liquid gasket that did not hold. Sounded great up until liquid gasket let go. Have a performance shop fixing it but excited to get it back. Car never sounded better.

5 stars 2 thumbs up Good product will use again
Exactly what the picture showed it fits my 2012 Buick Regal GS perfectly no modifications needed. It also changed the tone of the car for the better I will definitely use ZZ performance again

Good craftsmanship
Fit was great. Pro tip would be connect v band before installing mid pipe hanger. That will help with bending the flex around. Sets p0420 code as expected but nothing hp tuners can't help with.

LHU Regal o2 Housing/Downpipe
Awesome product!!! A must buy Pro easy to install, the build quality is top notch, you can fell the right off the bat performance, looks grate to bad it under the car where you can not see it and improved exhaust note. Before I bought this product I read in the reviews there was two thing that I had concern about. 1 you will get a check engine light. I did get a check engine light for hight flow on the o2 sensor only when I went wide open throttle. 2 the bracket would not fit. Everything fit just fine but this one bracket that you will not be able to use and that bracket look like something that not really needed because the stock muffler hanger work and fit just fine and easy to install.

Great product
Works good great sound make sure to get a good gasket for turbo part of installation instead of red rtv gasket sealant