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The Gibson single cat-back exhaust for 2008–2010 Hummer H3 Alpha (5.3L) is a stainless bolt-on system with a polished round slash-cut tip that exits straight from the back. Equipped with a baffled Superflow CFT muffler and mandrel-bent tubing plus factory-style hangers, it aims to reduce backpressure for measurable 5–10 hp gains while keeping cabin drone low. The kit installs easily and is backed by a Lifetime Limited Warranty.
Gibson 08-10 Hummer H3 Alpha 5.3L 3in Cat-Back Single Exhaust - Stainless
