DO NOT BUY this item if you own a 2002 Chevrolet Trailblazer LTZ. The flange that connects to the manifold does not match the size of the bolts protruding from the exhaust manifold. I have informed Flowmaster of this by providing pictures and exact measurements. They were supposed to create a specific product with my measurements but sent me the same item I received with the wrong flange the first time. 2 BIG strikes from Flowmaster here.