

Flowmaster 817709 Cat-back System - DOR - American Thunder - Moderate Sound
Key item features
- Performance Exhaust: This American Thunder cat-back system features a stainless steel 50 Series HD performance muffler, dyno-tuned for maximum performance and designed for moderately aggressive interior and aggressive exterior sound levels.
- Durable Construction: The system is constructed with mandrel-bent stainless steel tubing and a stainless steel 50 Series HD muffler with large 4.00 inch internals, ensuring durability and reduced restrictions.
- Flexible Tailpipes: It includes two large 3.00 inch stainless steel tailpipes, offering options for exiting out the sides behind the rear wheels or straight out the back under the rear bumper, finished with 4.00 inch polished stainless steel tips.
- Seamless Installation: The design utilizes factory hanger locations and clears the factory spare tire, making it a bolt-on, emissions-legal system with all necessary hardware and instructions included.
- Vehicle Compatibility: Compatible with 2014-2024 Ram 2500 trucks with a 6.4L Hemi engine, specifically Crew Cab Standard Bed/Long Bed and Mega Cab models with coil spring rear suspension, fitting 149.4, 160.5, and 169.4 inch wheelbases.
Specs
- Vehicle makeRam
- Vehicle model2500
- Vehicle year2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
- Inlet diameter3.500 in.
- Outlet diameter3.000 in
- Muffler typePerformance Mufflers
- Free shipping
Free 30-day returns
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About this item
Product details
The American Thunder® cat-back exhaust system for 2014-2024 Ram 2500 trucks is perfect for the person looking for moderately aggressive interior and aggressive exterior sound levels, with all of the performance benefits that you would expect from Flowmaster®. This bolt-on emissions-legal system fits the Crew Cab Standard Bed/Long Bed and Mega Cab models with a 6.4L engine and coil spring rear suspension. The system features a stainless steel 50 Series HD™ muffler with large 4.00 in. internals. The large dual 3.00 in. stainless steel tailpipes are mandrel-bent to reduce restrictions and maximize performance. The kit has two options for tailpipe exits, either out the sides behind the rear wheels for towing, or straight out the back under the rear bumper. They are finished off with a pair of large 4.00 in. polished stainless steel tips. The exhaust system is covered by our Lifetime Limited Warranty and includes all necessary parts, hardware and easy to follow installation instructions. Note: Fits 149.4, 160.5 and 169.4 in. wheelbases. Does not fit trucks with the optional factory airbag suspension.;
- Stainless Steel 50 Series HD Performance Muffler
- Dyno Tuned For Maximum Performance
- Mandrel-bent Stainless Steel Tubing
- Uses the Factory Hanger Locations
- Clears the Factory Spare Tire
- Stainless Steel Construction
- Includes Two Tailpipe Exits
- Lifetime Limited Warranty
Specifications
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Warranty
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| Product | Viewing this itemFlowmaster 817709 Cat-back System - DOR - American Thunder - Moderate Sound ![]() $1,349.95 current price $1,349.9534.7 out of 5 Stars. 3 reviews | Flowmaster 718207 Flow FX Cat-Back Exhaust System for Chevrolet, GMC (6.2) ![]() $1,413.95 current price $1,413.95 | Flowmaster 817590 Cat-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound ![]() $1,299.95 current price $1,299.95 | Flowmaster 717927 Flow FX Cat-Back Exhaust System for Chevy and GMC 6.6 ![]() $716.95 current price $716.95 | Flowmaster 818206 American Thunder Cat-Back Exhaust System for Chevrolet, GMC (6.2) ![]() $1,516.95 current price $1,516.95 | Flowmaster 817701 Cat-back System - DOR/S - Force II - Mild/Moderate Sound ![]() $1,299.95 current price $1,299.9514 out of 5 Stars. 1 reviews | Flowmaster 818197 Outlaw Cat-Back Exhaust System ![]() $1,649.95 current price $1,649.95 | Flowmaster 818192 Outlaw Extreme Cat Back System EXHAUST SYSTEM ![]() $989.95 current price $989.95 | Flowmaster 817979 American Thunder Cat-Back Exhaust System ![]() $1,024.95 current price $1,024.95 | Flowmaster 717912 Flowmaster FlowFX Cat-Back Exhaust System ![]() $699.95 current price $699.95 |
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| Vehicle make | RamFlowmaster 817709 Cat-back System - DOR - American Thunder - Moderate Sound | ChevroletFlowmaster 718207 Flow FX Cat-Back Exhaust System for Chevrolet, GMC (6.2) | FordFlowmaster 817590 Cat-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound | ChevyFlowmaster 717927 Flow FX Cat-Back Exhaust System for Chevy and GMC 6.6 | ChevroletFlowmaster 818206 American Thunder Cat-Back Exhaust System for Chevrolet, GMC (6.2) | FordFlowmaster 817701 Cat-back System - DOR/S - Force II - Mild/Moderate Sound | RAMFlowmaster 818197 Outlaw Cat-Back Exhaust System | -Flowmaster 818192 Outlaw Extreme Cat Back System EXHAUST SYSTEM | FordFlowmaster 817979 American Thunder Cat-Back Exhaust System | JeepFlowmaster 717912 Flowmaster FlowFX Cat-Back Exhaust System |
|---|---|---|---|---|---|---|---|---|---|---|
| Vehicle model | 2500Flowmaster 817709 Cat-back System - DOR - American Thunder - Moderate Sound | SilveradoFlowmaster 718207 Flow FX Cat-Back Exhaust System for Chevrolet, GMC (6.2) | Mustang GTFlowmaster 817590 Cat-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound | 2500HDFlowmaster 717927 Flow FX Cat-Back Exhaust System for Chevy and GMC 6.6 | -Flowmaster 818206 American Thunder Cat-Back Exhaust System for Chevrolet, GMC (6.2) | F-250 Super DutyFlowmaster 817701 Cat-back System - DOR/S - Force II - Mild/Moderate Sound | 1500Flowmaster 818197 Outlaw Cat-Back Exhaust System | 818192Flowmaster 818192 Outlaw Extreme Cat Back System EXHAUST SYSTEM | F-150Flowmaster 817979 American Thunder Cat-Back Exhaust System | GladiatorFlowmaster 717912 Flowmaster FlowFX Cat-Back Exhaust System |
| Vehicle year | 2014Flowmaster 817709 Cat-back System - DOR - American Thunder - Moderate Sound | 2024Flowmaster 718207 Flow FX Cat-Back Exhaust System for Chevrolet, GMC (6.2) | 2013Flowmaster 817590 Cat-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound | 2020Flowmaster 717927 Flow FX Cat-Back Exhaust System for Chevy and GMC 6.6 | 2024Flowmaster 818206 American Thunder Cat-Back Exhaust System for Chevrolet, GMC (6.2) | 2014Flowmaster 817701 Cat-back System - DOR/S - Force II - Mild/Moderate Sound | 2025Flowmaster 818197 Outlaw Cat-Back Exhaust System | -Flowmaster 818192 Outlaw Extreme Cat Back System EXHAUST SYSTEM | 2021Flowmaster 817979 American Thunder Cat-Back Exhaust System | 2020Flowmaster 717912 Flowmaster FlowFX Cat-Back Exhaust System |
| Inlet diameter | 3.500 in.Flowmaster 817709 Cat-back System - DOR - American Thunder - Moderate Sound | 3.50 inFlowmaster 718207 Flow FX Cat-Back Exhaust System for Chevrolet, GMC (6.2) | 3.00 inFlowmaster 817590 Cat-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound | 3.50 inFlowmaster 717927 Flow FX Cat-Back Exhaust System for Chevy and GMC 6.6 | 3.50 inFlowmaster 818206 American Thunder Cat-Back Exhaust System for Chevrolet, GMC (6.2) | 3.50 inFlowmaster 817701 Cat-back System - DOR/S - Force II - Mild/Moderate Sound | -Flowmaster 818197 Outlaw Cat-Back Exhaust System | -Flowmaster 818192 Outlaw Extreme Cat Back System EXHAUST SYSTEM | 3.0 inFlowmaster 817979 American Thunder Cat-Back Exhaust System | 3 inFlowmaster 717912 Flowmaster FlowFX Cat-Back Exhaust System |
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Customer ratings & reviews
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Showing 1-3 of 3 reviews
Easy install, for the most part.
2016 Ram 2500 6.4 hemi; The OEM system came off fairly easy without cutting. Had to raise vehicle to clear tailpipe for removal. The Flowmaster kit had everything, with good instructions. Everything fit well and was well thought-out using OEM hangar points. One issue was that the tailpipes were not swaged enough to slide over the mid-pipes. Had a muffler shop open them up a bit. The system was louder than I wanted, so I got some Car Chemistry inserts and installed them. Perfect!
Sounds great!
Installed on a brand new 2020 ram 2500 with the 6.4 liter and it sounds real good now!
2018 RAM 2500
The OEM system had to be cut to remove it. I cut the existing tubes in front and at the rear of the muffler to make it easy to remove. I did not lift the truck, but I do have 35s on it. the hanger in front of the muffler is 90 degrees the wrong way. I am going to have a muffler shop correct this. Sound is great, except an annoying drone around 2000 rpm. If you want the sound, every system has some issues, so I deal with it.










