Description
Overview
The Flowmaster® American Thunder® Exhaust System Kit is a complete catback exhaust engineered specifically for the 2019-2026 Chevrolet/GMC Silverado and Sierra equipped with the 2.7-liter engine. Built to bolt right into place using all of your factory hanger locations, this is a true performance exhaust upgrade that transforms the tone and flow of your truck without cutting corners. If you have been looking to shop for exhaust that delivers proven gains and a serious look, this American Thunder system pairs Flowmaster’s signature sound with clean, mandrel-bent construction.
Performance & Construction
Every component is manufactured from durable 409 stainless steel throughout, so the entire exhaust system stands up to heat and the elements. Dual 2.50-inch mandrel-bent pipes keep exhaust gas moving freely, and the 3.50-inch inlet feeds the American Thunder 50 Series Big Block muffler for a moderate sound level tuned for maximum performance. On the dyno, this setup delivers up to 4 hp and 11 lbs-ft of torque at the rear wheels over stock — real, measurable output from a car exhaust designed around your specific application.
Sound, Style & Exit Options
This American Thunder catback exits dual out the rear or dual out the side, finishing in dual 3.50-inch polished tips with an embossed logo for a custom look that matches the upgraded exhaust pipe flow underneath. The moderate sound profile means you get an aggressive, unmistakable Flowmaster note without droning on the highway — a balance many drivers chase when comparing options like Borla exhaust, Corsa exhaust, MagnaFlow exhaust, and Walker exhaust systems.
- 409 stainless steel construction throughout for lasting durability
- Dual 2.50-inch mandrel-bent pipes with a 3.50-inch inlet for improved flow
- American Thunder 50 Series Big Block muffler (28.00-inch overall length, center inlet, dual outlet) included
- Dual 3.50-inch polished tips with embossed logo and black muffler finish
- Gains of up to 4 hp and 11 lbs-ft of torque at the rear wheels over stock
- Dual rear or dual side exit configuration
Fitment & Installation
Designed for the 2019-2026 Chevrolet/GMC Silverado/Sierra 2.7L, this exhaust system uses all existing factory hanger locations for a clean, no-drama fit. The kit includes installation instructions and all necessary hardware, making it an easy at-home install — no need to search for an exhaust pipe shop near me. The system is CARB (California) compliant with Emission Code 5.
Whether you are upgrading a daily driver or a work truck, this Flowmaster American Thunder catback is a straightforward way to add power, tone, and style. Backed by Flowmaster’s Lifetime Limited Warranty, it is a confident choice for anyone comparing performance exhaust systems for the 2.7L Silverado and Sierra.
