replaces your catalytic converter. I paid over $550 w shipping. It is still in original box. Custom made by ZZ Performance. Was sent wrong thing. Showed as compatible with my Malibu but it wouldn’t work, and the company would not let me return it. This o2 housing bolts directly to the turbo's outlet and then bolts to the factory downpipe. It is 3" in diameter, an o2 bung for your factory o2 sensor, and 100% stainless steel. The outlet flange is tapped just like the factory o2 housing for ease of install, you will not have to deal with trying to hold the bolt when tightening the nut in the tight engine bay.
**** Available in Southeast Kent area just north of Trader Joes, just west of Lake Meridian (2.4 miles west of covington Fred Meyer, 1 mile north of Reber Ranch Or meet certain times near Kentwood High in Covington) OR meet in West Seattle .