Description
Overview
Upgrade your 2025-2026 Ram 1500 equipped with the 3.0-liter High Output engine using the Flowmaster American Thunder Direct-Fit Muffler Assembly. Engineered as a straightforward performance exhaust upgrade, this cat back muffler system replaces the factory muffler with a purpose-built, aggressive-sounding assembly that bolts into all the original hanger locations. It’s a value-packed way to add attitude and reclaim power without complicated fabrication, making it an ideal choice when you shop for exhaust that installs at home.
Built from durable 409 stainless steel throughout the muffler body and piping, this Flowmaster muffler is designed for years of trouble-free service against heat, road spray, and corrosion. The 3.00-inch inlet pipe feeds a compact oval muffler for improved flow, while the dual-out rear exit style delivers the deep, aggressive tone the American Thunder series is known for.
Performance & Sound
This performance exhaust system is dyno-proven to deliver max gains of 13 horsepower and 12 lb-ft of torque at the rear wheels power you can actually feel behind the wheel. The Super 40-based muffler produces an aggressive sound level that gives your truck real presence without overwhelming the cabin. As a genuine catback exhaust upgrade, it transforms both the performance and the character of your car exhaust setup.
Key Highlights
- Flowmaster American Thunder series direct-fit muffler for the 25-26 Ram 1500 3.0L High Output
- Constructed from 409 stainless steel muffler body, pipe, and tubing for lasting durability
- Dual out rear exit style with dual inlet and dual outlet configuration
- 3.00-inch main piping and inlet/outlet diameter for strong flow
- Aggressive sound level with the oval Super 40-based muffler
- Max dyno gains of 13 hp and 12 lb-ft at the rear wheels
- Uses factory hangers and connections clamps and hardware included
Fitment & Installation
This cat back exhaust system is a direct-fit design that uses all factory hanger locations and connections, connecting the dual-exit muffler to the factory tailpipes for a simple, effective performance upgrade. It fits both 2WD and 4WD models. Because everything mounts to the original locations, installation is an easy driveway project. Flat band clamps and all necessary hardware are included, and the kit ships with installation instructions.
Note that exhaust tips are not included and are sold separately, giving you the freedom to finish the look your way. The muffler measures 13.5 inches in body length with a 5.00-inch body height and an overall assembled length of 59 inches, finished in a painted black coating.
Whether you’re comparing MagnaFlow exhaust and Flowmaster muffler options or simply want a proven exhaust system for your Ram, this American Thunder assembly delivers the tone, durability, and bolt-on convenience truck owners expect. WARNING: This product carries a California Proposition 65 warning.
