Skip to content
Enhance your RAM 1500 with superior sound and performance.
The Flowmaster American Thunder Direct-Fit Muffler is designed specifically for the 2025 RAM 1500 equipped with the 3 liter High Output engine. This performance exhaust system features a robust 409 stainless steel construction, ensuring durability and longevity. With a 3 inch dual inlet and outlet configuration, it maximizes exhaust flow while delivering a deep, aggressive sound that enhances the driving experience.
This system is engineered for both 2 and 4 wheel drive models, utilizing factory hanger locations for straightforward installation. The included Super 10 based muffler is tuned to provide optimal performance, resulting in significant power gains of up to 18 horsepower and 15 feet-pounds at the wheels. The design allows for a seamless connection to factory tailpipes, making it an effective upgrade for those seeking improved performance without extensive modifications.
Installation is simplified with complete hardware and detailed instructions provided in the kit. The 3 inch mandrel bent tubing not only improves exhaust flow but also contributes to the overall durability of the system. The Flowmaster American Thunder Muffler is a reliable choice for enhancing the performance and sound of your RAM 1500.
Features
- 3 Inch Mandrel Bent 16 Gauge 409 Stainless Steel Tubing Maximizes Exhaust Flow And Improves Durability
- Kit Features Complete Hardware And Factory Styled Hangers In The Stock Locations For An Easy Installation
- An Tuned Super 40 Series Style Chambered Muffler Delivers A Deep, Aggressive To Moderate Performance Tone And Improves Exhaust Flow
- Maximum Increases Of Up To 18 Horsepower And 15 Feet-Pound Over The Stock Exhaust At The Wheels
- Tuned Performance Muffler Offers Quality Sound Inside And Outside Of The Truck
Specifications
- Manufacturer: Flowmaster
- Manufacturer Part Number: 818204
- Shape: Oval
- Inlet Position: Offset Dual
- Inlet Diameter (IN): 3 Inch
- Outlet Position: Offset Dual
- Outlet Diameter (IN): 3 Inch
- Universality: Vehicle Specific
- Estimated Install Time (Hours): 1
- Case Length (IN): 13-1/2 Inch
- Overall Length (IN): 59 Inch
- Color/ Finish: Black Painted
- Material: Stainless Steel
- Tip Length (IN): Without Tip
- Tip Diameter (IN): Without Tip
- Tip Finish: Without Tip
- Tip Material: Without Tip
Compatibility / Fit
- 2025-2026 Ram 1500
Technical Documents
Product Videos
Shipping & Returns
- This product ships within the continental USA only.
- This product typically ships within 1 to 3 business days.
- Returns are accepted within 30 days for items in like-new condition. For complete details, please see our return policy.
