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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Gibson 11-19 GMC Sierra 2500 HD Denali 6.0L 3.5in/3in Cat-Back Dual Extreme Exhaust - AluminizedFor the extremist who wants to take their truck to the next level, this dual bolt on Cat back system is for you. This system exists behind the rear tires at an aggressive angle with a powerful exhaust tone. You will gain bold street looks with powerful dyno tuned and tested street performance gains. You can expect to experience gains on average of 15 20 horsepower. Gibson muffler provides a mean performance sound and complemented with polished
For the extremist who wants to take their truck to the next level, this dual bolt-on Cat back system is for you. This system exists behind the rear tires at an aggressive angle with a powerful exhaust tone. You will gain bold street looks with powerful dyno tuned and tested street performance gains. You can expect to experience gains on average of 15-20 horsepower. Gibson muffler provides a mean performance sound and complemented with polished Stainless Tip. Easy bolt-on installation. No welding required. Backed by a Lifetime Limited Warranty. If you want Extreme, this system is it.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2019 | Chevrolet | Silverado 2500 HD | High Country |
| 2011-2019 | Chevrolet | Silverado 2500 HD | LT |
| 2011-2019 | Chevrolet | Silverado 2500 HD | LTZ |
| 2011-2019 | Chevrolet | Silverado 2500 HD | WT |
| 2015-2019 | Chevrolet | Silverado 3500 HD | High Country |
| 2011-2019 | Chevrolet | Silverado 3500 HD | LT |
| 2011-2019 | Chevrolet | Silverado 3500 HD | LTZ |
| 2011-2019 | Chevrolet | Silverado 3500 HD | WT |
| 2015-2019 | GMC | Sierra 2500 HD | Base |
| 2011-2019 | GMC | Sierra 2500 HD | Denali |
| 2011-2019 | GMC | Sierra 2500 HD | SLE |
| 2011-2019 | GMC | Sierra 2500 HD | SLT |
| 2011-2014 | GMC | Sierra 2500 HD | WT |
| 2015-2019 | GMC | Sierra 3500 HD | Base |
| 2011-2019 | GMC | Sierra 3500 HD | Denali |
| 2011-2019 | GMC | Sierra 3500 HD | SLE |
| 2011-2019 | GMC | Sierra 3500 HD | SLT |
| 2011-2014 | GMC | Sierra 3500 HD | WT |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Perfect fit
Worked great for a 1965 mercury thunderbolt 150hp
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Reviewed in the United States on June 3, 2025
★★★★★ 5
MerCruiser Replacement Parts
OEM quality MerCruiser Alpha 1 Gen1 replacement part. Everything you need and some things you don't because it's a universal kit that works for several models.
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Reviewed in the United States on July 19, 2025
★★★★★ 5
OEM is always the answer
No reason not to go OEM for this! Came with every possible gasket and seal I could need. Specifically for my Alpha One Gen 1 it took maybe 25-30 min to completely install.
While you’re there check the base plate for wear and the other surrounding items like your water tube. Rather keep the lower unit off for an extra day to get another part than a catastrophic failure.
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Reviewed in the United States on September 9, 2025
★★★★★ 5
Husbands things
My husband bought this. I don’t know much about it but he has zero complaints. He bought it for a boat. He has fixed up 2 boats, sold one & we kept the other. So he apparently knows what to buy & how to use it.
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Reviewed in the United States on November 6, 2025
★★★★★ 4
Amazon is easy and fast . No problems the oarts was exactly as described.
liked that everything was in one bag . and could make sure everything was changed .
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Reviewed in the United States on August 3, 2020