This exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. It includes all necessary gaskets and downpipe hardware for a complete repair. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Buick Lucerne: 2009, 2010, 2011] - [Buick Terraza: 2006, 2007] - [Chevrolet Impala: 2006, 2007, 2008, 2009, 2010, 2011] - [Chevrolet Monte Carlo: 2006, 2007] - [Chevrolet Uplander: 2006, 2007, 2008] - [Pontiac Montana: 2006] - [Saturn Relay: 2006, 2007]