2019-2024
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
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Flowmaster American Thunder Dual Exhaust System; Side/Rear Exit (07-08 4.8L Sierra 1500)Find parts that fit my vehicle
Item S503517
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$931.46
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Ship to: Columbus - 43215
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Wards Auto Repair LLC
551 Corbett Rd, Groveport, OH
11 miles away
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Total cost of service $299.00
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Powerful Cat-Back Exhaust
- Classically Aggressive Sound
- Horsepower and Torque Gains
- Improves Fuel Efficiency
- Includes Super 40 Series Muffler
- 2.5 in. Mandrel-Bent Steel Tubing
- Features Dual Wall Steel Tips
- Constructed in America
- Easy, Bolt-On Installation
- Limited Lifetime Warranty
- Fits all 2007-2008 4.8L GMC Sierra 1500s
| Brand | Flowmaster |
| Exhaust System Type | Cat-Back System |
| Exhaust Tip Finish | Chrome, Polished |
| Exhaust Tubing Diameter | 2.50 Inch |
| Exhaust Material | Stainless Steel |
| Exhaust Tip Outlet Style | Dual |
| Exhaust Exit Location | Both Sides or Rear - After Tire |
| Exhaust Loudness | Moderate |
Description
Top-Notch Style. Thanks to Flowmaster's American Thunder Cat-Back Exhaust Split Side/Rear Exit, your 2007-2008 4.8L GMC Sierra 1500 won't be just one of the pack. This high-performance cat-back exhaust will provide your truck with an eye-catching look and an intimidating sound that will make all the other drivers jealous of your rig.
High-End Function. Not only does this exhaust offer an ideal look and sound, but it also provides unbeatable gains in horsepower and torque that give you the upper hand on the road and the trails. The exhaust's design also establishes your dominance at the pump as it provides improvements for your fuel mileage as well.
Maximum Durability. This exhaust features 2.5 in. mandrel-bent stainless steel tubing in order to maximize exhaust flow and ensure superior durability in all conditions. The American-made exhaust also includes 3.5 in. dual wall stainless steel tips for a great look and a Super 40 Series Muffler for an enhanced performance.
Warranty. Backed by an impressive limited lifetime warranty, you'll be protected against any defects in materials and craftsmanship. Some limitations apply.
Installation. Installing this exhaust takes about 2 hours to complete with moderate mechanical experience. Simply use the included hardware and basic hand tools to bolt the exhaust to your truck.
Application. Flowmaster's American Thunder Cat-Back Exhaust Split Side/Rear Exit is built to fit 2007-2008 4.8L GMC Sierra 1500s.
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Fitment:
DetailsFlowmaster 817680
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Exhaust
- (2) Polished Tips
- Installation Hardware
- Detailed Instructions
Tech Guides:
4.6
Customer Reviews (240)
Questions & Answers
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Will It Fit My Sierra 1500
- 4.8L V8 - 07, 08
