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Flowmaster American Thunder Cat-Back Exhaust System 817477

Flowmaster American Thunder Cat-Back Exhaust System 817477
Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477Flowmaster American Thunder Cat-Back Exhaust System 817477
$1,546.99 ea
NEWARRIVING SOONEstimated Ship Date 07/03/2025 (If Ordered Today)4 Available from HOLLEY PERFORMANCE PRODUCTS as of 06/15/2025
Model: 4005331
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
OVERSIZE 2
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[More Info]
Wake up the power and performance of your 5.7L Hemi-powered 2009-2023* (*classic body) RAM 1500, and 2009-2013 4.7L models, with the American Thunder® Cat-back exhaust system. The system is fully constructed from 16-gauge mandrel-bent stainless steel tubing flowing into a 50 Series HD™ performance muffler with minimal interior drone in the cab, but with a moderately deep aggressive exterior tone. This custom system features dual 2.50-inch mandrel-bent tailpipes finished off with a pair of large 4.00-inch polished stainless steel tips exiting straight out the back under the rear bumper for a muscular look. The system includes all necessary parts and hardware required for an easy installation that you can do at home. Covered with our Lifetime Limited Warranty.
Features:
  • For RAM Trucks with Exhaust Cutouts in Rear Bumper
  • Mandrel-bent 16-gauge Stainless Steel Tubing
  • Dual Outlet 50 Series HD Performance Muffler
  • Moderatley Aggressive Exterior Exhaust Tone
  • Polished 4.00-inch Stainless Steel Tips
  • Uses the Factory Hanger Locations
  • Clears the Factory Spare Tire
  • Lifetime Limited Warranty
  • Easy Installation
Fits 2009-2023* (*Classic Body) RAM 1500 with 5.7L Hemi Magnum, 2009-2013 4.7L models, 2/4 Wheel Drive, All Wheelbases (Does not fit trucks with factory single exit tailpipe or 2019-2023 New Body.)
Installation Notes:
Fits 2009-2023* (*Classic Body) RAM 1500 with 5.7L Hemi Magnum, 2009-2013 4.7L models, 2/4 Wheel Drive, All Wheelbases (Does not fit trucks with factory single exit tailpipe or 2019-2023 New Body.)
About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.

Downloads:

Download Name File Size
fm_warranty_general.pdf88.58KB
817477_instructions.pdf3.09MB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine Fitment Notes
Dodge Ram 1500 Laramie 2009 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Dodge Ram 1500 Laramie 2010 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Dodge Ram 1500 SLT 2009 4.7L / 287 / V8
5.7L / 345 / V8
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Does not fit trucks with factory single exit tailpipe.
Dodge Ram 1500 SLT 2010 4.7L / 287 / V8
5.7L / 345 / V8
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Does not fit trucks with factory single exit tailpipe.
Dodge Ram 1500 ST 2009 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Dodge Ram 1500 ST 2010 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Dodge Ram 1500 Sport 2009 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Dodge Ram 1500 Sport 2010 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Dodge Ram 1500 TRX4 2009 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Dodge Ram 1500 TRX4 2010 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Dodge Ram 1500 TRX 2009 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Dodge Ram 1500 TRX 2010 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Classic Big Horn 2019 5.7L / 345 / V8
Ram 1500 Classic Express 2019 5.7L / 345 / V8
Ram 1500 Classic Express 2020 5.7L / 345 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Classic Express 2021 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Express 2022 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Express 2023 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Lone Star 2019 5.7L / 345 / V8
Ram 1500 Classic Night Edition 2021 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
Ram 1500 Classic SLT 2019 5.7L / 345 / V8
Ram 1500 Classic SLT 2020 5.7L / 345 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Classic SLT 2021 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic SLT 2022 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic SLT 2023 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic ST 2019 5.7L / 345 / V8
Ram 1500 Classic ST 2020 5.7L / 345 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Classic Special Service 2019 5.7L / 345 / V8
Ram 1500 Classic Special Service 2021 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Special Service 2022 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Special Service 2023 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Tradesman 2019 5.7L / 345 / V8
Ram 1500 Classic Tradesman 2020 5.7L / 345 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Classic Tradesman 2021 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Tradesman 2022 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Tradesman 2023 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Warlock 2020 5.7L / 345 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Classic Warlock 2021 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Warlock 2022 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Classic Warlock 2023 5.7L / 345 / V8 WITH FACTORY DUAL TAILPIPES ONLY
with factory dual tailpipes only
Ram 1500 Big Horn 2011 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Big Horn 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Big Horn 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Big Horn 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Big Horn 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Express 2013 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Express 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Express 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Express 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Express 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Limited 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Limited 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Longhorn 2012 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Longhorn 2013 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Longhorn 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Longhorn 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Longhorn 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Longhorn 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie Longhorn 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2011 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2012 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2013 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Laramie 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Limited 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Limited 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Limited 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Lone Star 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Lone Star 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Lone Star 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Lone Star 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Outdoorsman 2011 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Outdoorsman 2012 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Outdoorsman 2013 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Outdoorsman 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Outdoorsman 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Outdoorsman 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 R/T 2013 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Rebel 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Rebel 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Rebel 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2011 4.7L / 287 / V8
5.7L / 345 / V8
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2012 4.7L / 287 / V8
5.7L / 345 / V8
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2013 4.7L / 287 / V8
5.7L / 345 / V8
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 SLT 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 ST 2011 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 ST 2012 5.7L / 345 / V8
4.7L / 287 / V8
Does not fit trucks with factory single exit tailpipe.
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 ST 2013 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 ST 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 SXT 2011 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 SXT 2013 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Special Service 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Special Service 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Special Service 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Special Service 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Special Service 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2011 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2012 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2013 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Sport 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Tradesman 2011 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Tradesman 2012 4.7L / 287 / V8 DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Ram 1500 Tradesman 2013 4.7L / 287 / V8
5.7L / 345 / V8
DOES NOT FIT TRUCKS WITH FACTORY SINGLE EXHAUST
Does not fit trucks with factory single exit tailpipe.
Ram 1500 Tradesman 2014 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Tradesman 2015 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Tradesman 2016 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Tradesman 2017 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.
Ram 1500 Tradesman 2018 5.7L / 345 / V8 Does not fit trucks with factory single exit tailpipe.

Specifications:

2WD/4WD 2WD/4WD
California Proposition 65 Chemical Name Chromium (hexavalent compounds), Nickel (Metallic)
California Proposition 65 Required Yes
Emission Code 5
Exhaust Series American Thunder
Exit Position Dual Out Rear
Heat Shield No
Inlet Diameter (in) 3
Material 409 Stainless Steel
Muffler Part Number Kit Only
Muffler Quantity 1
Muffler Series 50 Series HD
Outlet Diameter (in) 2.5
Part Type Exhaust System Kit
Product Type Exhaust System
Proposition 65 www.P65Warnings.ca.gov
Single Dual Dual
Sound Level Aggressive
System Type Cat-back
Tip Diameter (in) 4
Tip Quantity 2
Tubing Diameter (in) 3
Warranty Limited Lifetime (Lifetime)

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Flowmaster American Thunder Cat-Back Exhaust System 817477: