LHU Regal O2 Housing/Downpipe Package

The ZZP LHU Regal O2 Housing/Downpipe Package is a high-flow exhaust upgrade constructed from durable stainless steel, designed to replace the factory O2 housing and downpipe for increased longevity and performance. This two-piece unit utilizes a 3" V-Band clamp assembly, similar to the stock configuration, ensuring a secure fit. The product features EPA-certified high-flow catalytic converters, though it's important to note that these may not meet CARB compliance standards. For those states requiring CARB compliance, further inquiry with ZZPerformance customer service is advised. Installation requires attention to the O2 housing gasket; the factory ring-style gasket is omitted, and a small amount of red high-heat RTV is recommended for the connection between the turbo and the O2 housing. Select the correct model (Standard or GS) as the GS variant features different hanger locations and a larger outlet flange. This package is compatible with the 2011-2013 Buick Regal 2.0T. ZZPerformance offers an incentive for returning your stock catalytic converter.