Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Features, Description, Reviews, Q&A, Specs & Installation
| 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 | Aggressive |
Enhanced Dual Exhaust System. The Flowmaster American Thunder Dual Exhaust System with Polished Tips; Side or Rear Exit is engineered to improve exhaust flow and deliver a moderate aggressive tone for 2.7-liter Chevrolet and GMC Sierra 1500 trucks. This performance upgrade increases horsepower and torque while providing a custom appearance with dual polished tips and versatile exit options, perfect for enthusiasts wanting to enhance both sound and performance.
Construction and Appearance. Made entirely from durable 409 stainless steel, this exhaust system features mandrel bent tubing for optimal flow. The muffler is finished in black high-temperature paint for added durability, and the dual 3.50-inch polished stainless steel tips have an angled cut and double-wall design, giving the system a distinctive polished look.
Installation. Designed for straightforward installation using factory hanger locations, this system includes all necessary hardware and mounting brackets. No cutting or drilling is required, enabling installation by those with basic mechanical skills.
Warranty. Backed by a lifetime limited warranty covering defects in materials and workmanship, ensuring long-term reliability and customer confidence.
Application. Specifically designed to fit 2019 through 2026 Chevrolet and GMC Sierra 1500 trucks equipped with the 2.7L four-cylinder engine, compatible with both 147-inch and 157-inch wheelbase configurations for a precise fit.
Flowmaster 818113
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation Info
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
What's in the Box
Tech Guides: