Description
Bring aggressive sound and enhanced performance to your 2025 RAM 1500 with the Flowmaster American Thunder Direct-Fit Muffler Kit, designed specifically for models equipped with the 3.0L High Output engine. Engineered for both 2WD and 4WD configurations, this system is built using high-quality 409 stainless steel and delivers a bold, performance-driven exhaust note backed by dyno-proven power gains.
The system features a single 3.00-inch mandrel-bent inlet pipe feeding into a high-temperature black painted Flowmaster Super 40-based chambered muffler. The dual outlet setup connects directly to the factory tailpipes for a seamless fit, giving you a reliable and hassle-free installation using factory hangers and all included hardware.
With gains of up to 13 horsepower and 12 lb-ft of torque at the rear wheels, this muffler system not only sounds aggressive—it performs. The tuned Super 40 muffler provides a distinctive, deep exhaust tone that’s loud on the outside but still refined enough for daily driving. Whether you're towing or cruising, this direct-fit solution brings that signature Flowmaster performance to life.
Key Features:
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Constructed from 409 stainless steel for corrosion resistance and long-lasting durability
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Includes a 3.00-inch mandrel-bent inlet pipe for optimized exhaust flow
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Chambered Super 40-style muffler delivers a deep, aggressive exhaust tone
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Black painted finish adds a sleek, durable appearance
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Dual rear exit design connects directly to factory tailpipes
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Delivers dyno-tested gains of up to 13 horsepower and 12 lb-ft of torque
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Utilizes factory hanger locations for straightforward, bolt-on installation
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Includes all necessary hardware and installation instructions
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Covered by Flowmaster’s Limited Lifetime Warranty
Fitment:
Compatible with the following 2025 RAM 1500 models equipped with the 3.0L L6 High Output engine:
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2025 RAM 1500 Limited (183/3.0L L6 High Output)
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2025 RAM 1500 Tungsten (183/3.0L L6 High Output)
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2025 RAM 1500 Limited Longhorn (183/3.0L L6 High Output)
Supports both rear-wheel and four-wheel drive configurations.
Specifications:
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Product Type: Exhaust Muffler Assembly
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System Type: Direct-Fit Muffler
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Exhaust Series: American Thunder
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Muffler Series: Super 40
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Muffler Type: Reflection / Chambered
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Sound Level: Aggressive
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Main Tubing Diameter: 3.00 in
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Muffler Body Shape: Oval
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Muffler Body Length: 13.50 in
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Muffler Color: Black
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Material: 409 Stainless Steel
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Finish: High-Temperature Painted
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Exit Style: Dual Out Rear (DOR)
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Inlet Quantity: 1
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Outlet Quantity: 2
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Inlet Diameter: 3.00 in
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Outlet Diameter: 3.00 in (Slip-Fit)
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Mounting Style: Factory Hangers
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Overall Length: 59 in
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Warranty: Flowmaster Limited Lifetime Warranty
Upgrade your 2025 RAM 1500 with the Flowmaster American Thunder Direct-Fit Muffler and unleash aggressive sound, superior performance, and durable stainless steel construction built to last.
