LLY Duramax Exhaust Systems

Upgrade your 2004.5–2005 LLY Duramax with a high-performance exhaust system built for maximum flow, lower EGTs, and aggressive sound. Crafted from durable stainless or aluminized steel, these systems improve horsepower, torque, and fuel efficiency while resisting rust and corrosion. Whether you're towing, daily driving, or building a tuned diesel, our premium LLY Duramax exhaust systems deliver the quality and performance serious truck owners demand.

6 Items

**LB7|LLY Duramax Large Bore HD 4 Inch CAT Back Exhaust AFE 49-14001** $660.00
Fits: LB7|LLY Duramax - 2001-2005

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**LB7|LLY Duramax Large Bore HD 4 Inch CAT Back Exhaust AFE 49-44001** $808.00
Fits: LB7|LLY Duramax - 2001-2005

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**LB7|LLY Duramax Mach Force XP 4 Inch Cat-Back Exhaust AFE 49-44002** $808.00
Fits: LB7|LLY Duramax 2006-2007

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**Duramax 2001-2005 4 Inch Performance Series CAT-Back Exhaust System MBRP S6000P** $484.99
Fits: Duramax 2001-2005 (W/ Catalytic Converter) (Fits All Crew & Extended Cabs)

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**Duramax 2001-2005 4 Inch Installer Series CAT-Back Exhaust System MBRP S6000AL** $604.99
Fits: Duramax 2001-2005 (W/ Catalytic Converter) (Fits All Crew & Extended Cabs)

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**LBZ Duramax Large Bore HD Exhaust (CAT-Back) AFE 49-14002** $660.00
Fits: Duramax 2006-2007

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