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Gibson

Gibson 11-19 GMC Sierra 2500 HD Denali 6.0L 3.5in/3in Cat-Back Dual Extreme Exhaust - Aluminized

$1,642.82 $1,475.27 Save $167.55

SKU: G003 5652

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Gibson Dual Extreme Series Cat-Back Exhaust System is engineered for maximum power and an aggressive sound. It features a baffled and chambered Gibson Superflow Muffler for a deep exhaust note with minimal cabin drone. Constructed from heavy-duty aluminized mandrel-bent tubing, this system ensures durability and optimal flow. It delivers dyno-proven gains of 10-15 horsepower and 15-20 lb-ft of torque (1,800–3,000 RPM) and is designed for easy bolt-on installation using factory hangers and clamps. It exits behind each rear tire with 4-inch polished T-304 stainless steel, rolled slash-cut tips. Proudly made in the USA and backed by a Lifetime Limited Warranty. It is 50-state legal.

Fitment

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Specifications

BrandGibson
Part NumberG003 5652

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Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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