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Exhaust (LLY)

Opening up the restrictive exhaust on your Duramax LLY is essential to fuel mileage gains and power gains.  This simple and inexpensive upgrade to your Duramax LLY results in a big change in the way it feels, drives, and sounds!  It is one of those modifications that you won't regret.  So get an exhaust for your Duramax LLY today!