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Gibson

Gibson 14-18 GMC Sierra 1500 Denali 5.3L 3.5in Cat-Back Single Exhaust - Stainless

$1,600.10 $658.86 Save $941.24

SKU: G003 615628

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

This exhaust system is engineered to provide an ultimate boost in acceleration, towing, hill climbing, and passing power. It is designed for maximum low-end torque and horsepower (1800-3000 RPM), with dyno testing showing gains of 10-15 horsepower and 15-20 lb-ft of torque. The Gibson Superflow Muffler features a baffled and chambered design with no internal packing, resulting in minimal interior drone and an aggressive sound. Each T-304 polished stainless tip is crafted for durability and style, exiting behind the rear tire. The system is constructed with stainless steel mandrel-bent tubing and includes all factory hangers and clamps for a seamless, bolt-on installation without welding. It is proudly Made in the USA and backed by a Lifetime Limited Warranty.
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Part #: 615628

Gibson Single Side Exhaust is perfect for improved acceleration, maximum hill climbing, towing and passing power. This is our best performing Exhaust System. Exits behind the rear tire. Quieter in the cab than any other Performance Exhaust. Dyno test results show it makes maximum torque and horsepower at low-end (1800 to 3000 RPM). Horsepower gains average 18-21 and 20-22lb-ft of increase torque. Hassle free, bolt-on installation with professional looking results. No welding required. Backed by a Lifetime Limited Warranty.

Features:

  • Stainless Steel Mandrel Bent Tubing
  • Superflow (TM) Muffler
  • Baffled/Chambered Muffler; No Internal Packing
  • Minimal Interior Drone - Aggressive Sound
  • Polished Stainless Steel Slash-Cut Tips
  • Incl. Hardware/Factory Style Hangers For Easy Bolt-On Install
  • Lifetime Limited Warranty

Cat-Back Single Exhaust System | Stainless

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGibson
Part NumberG003 615628

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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