Your RAM might be silent and strong now, but wouldn’t it be way cooler if it rumbled like distant thunder every time you hit the gas? Meet the Flowmaster American Thunder Direct-Fit Muffler—because your truck deserves to growl, not whisper.
Designed for the 2025 RAM 1500 with the 3.0L Standard Output engine, this exhaust system gives your ride a power-packed attitude upgrade without needing a whole toolbox or a weekend of regret. It’s a direct-fit system, which means it bolts right onto your truck using the factory hanger locations. No welding, no cutting, and no tears. Just satisfaction.
Built from tough-as-nails 409 stainless steel and sporting 3.0-inch mandrel-bent tubing, this thing is made for long hauls, muddy trails, and all the judgmental looks from quiet stock trucks. At its heart is the Super 10 series muffler—Flowmaster’s loudest chambered design—delivering a deep, aggressive tone that might just startle the squirrels in your neighborhood.
And hey, it’s not just about the sound. This bad boy gives you dyno-proven gains of up to 13 horsepower and 12 lb-ft of torque at the rear wheels. That’s not just noise—that’s performance you can feel.
The dual-exit muffler connects cleanly to your existing tailpipes, and the whole thing is backed by Flowmaster’s Lifetime Limited Warranty, because they’re just as confident in their work as you’ll be after install.
Whether you’re towing, cruising, or just trying to make your neighbors jealous, this system adds the bark and the bite. Pro tip: crack a window and enjoy that tone—you earned it.
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