Flowmaster American Thunder Cat-Back Exhaust System - Flowmaster (818199)

  • Sale Price: $2,044.39
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Manufacturer Warranty Minimum of 12 Months
Guaranteed Fitment Always the correct parts
Shop with Confidence Your information is safe
In-House Experts We know our products

Details

  • Brand:

     Parts

  • SKU:

    818199

  • GTIN: 00090127958551
  • UPC: 090127958551
  • Description: Flowmaster's® American Thunder Cat-back true dual exhaust system for the 2025 - 2026 RAM 1500 with the 3.0-liter Standard and High Output engines gives you a great way to customize your RAM 1500 to your personality. This performance exhaust system fits both 2/4 Wheel drive models and is manufactured from 409 stainless steel for years of trouble-free service and performance. Features include dual 3.00-inch inlet pipes leading into a custom tuned 409 stainless steel American Thunder series muffler for great sound and maximum performance. This Cat-back system includes Flowmaster’s exclusive Scavenger X-Pipe with our D-Port technology for maximum exhaust pulse velocity and helps to create a deep exhaust tone. The dual 3.0-inch mandrel-bent tailpipes exit in the stock location in the factory bumper cut outs with 4.5-inch black ceramic coated tips. Included in the tailpipe assemblies are tuned resonators that help maintain a comfortable experience in the cab. On Standard Output models this system turns the exhaust into a true dual style system like the High Output and RHO models. This will allow for better overall performance gains and will work better with any future engne modifications. Max dyno gains of 35 hp and 33 lb-ft at the rear wheels (HO models) deliver power you can feel! The system uses all the factory hanger locations and connections for an easy installation that you can do at home. Kits include installation instructions and all necessary hardware. Backed by Flowmaster's Lifetime Limited Warranty.
    Fits 2025 - 2026 RAM 1500 3.0L Standard and High Output, American Thunder Cat-Back 409 stainless steel
    2025 RAM 1500 3.0L AMT, CB, DOR
    SYS 2025 RAM
    Does not fit RHO models.
    Manufacturer of performance exhaust systems, mufflers, performance air intakes, 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 4 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.
  • Condition: New
  • Disclaimer: Yes

Key Product Benefits

  • 3.0-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Black ceramic coated stainless steel tips add a custom look to the vehicle
  • Kit includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • An Super 40 series muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow
  • Max increases of up to 35 hp and 33 lb-ft over the stock exhaust at the wheels
  • Lifetime Limited Warranty
  • Tuned performance tones offer quality sound inside and outside of the truck
  • Converts Standard Output models to a true dual style system like on High Output and RHO models

Additional Information

Brand Flowmaster
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
Nickel (Metallic)
CARB (California) Compliant Yes
Catalytic Converter Included No
Catalytic Converter Quantity 0
Category Exhaust
Clamping Type Flat Band
Clamps Included Yes
Emission Code 5
Exhaust Series American Thunder
Exhaust Tip Color Black
Exhaust Tip Connection Clamp-On
Exhaust Tip Cut Angled
Exhaust Tip Diameter 4.50
Exhaust Tip Edge Rolled Edge Angle Cut
Exhaust Tip Finish Black Ceramic Coating
Exhaust Tip Intercooled No
Exhaust Tip Length 11.00
Exhaust Tip Material 304 Stainless Steel
Exhaust Tip Quantity 2
Exhaust Tip Resonated No
Exhaust Tip Shape Round
Exhaust Tip Wall Single Wall
Exit Style Dual Out Rear
Finish Natural
Gasket Or Seal Included No
Grade Type Performance
Hangers Included Yes
Inlet Diameter 3.00
Inlet Type Clamp-On
Main Piping Diameter 3.00
Mounting Bracket Included Yes
Muffler Body Height 5.00
Muffler Body Length 13.50
Muffler Body Material 409 Stainless Steel
Muffler Body Shape Oval
Muffler Body Width 10.00
Muffler Finish Black High-Temperature Paint Finish
Muffler Flanged Inlet No
Muffler Flanged Outlet No
Muffler Included Yes
Muffler Inlet Connection Slip-Fit
Muffler Inlet Inside Diameter 3.00
Muffler Inlet Location Dual
Muffler Inlet Outside Diameter 3.13
Muffler Outlet Connection Slip-Fit
Muffler Outlet Diameter 3.00
Muffler Outlet Location Dual
Muffler Outlet Quantity 2
Muffler Quantity 1
Muffler Type Chambered
part type Exhaust System
Pipe Color Silver
Pipe Material 409 Stainless Steel
Product Type Exhaust System
Resonator (Rear Left) Body Height 6.10
Resonator (Rear Left) Body Length 8.25
Resonator (Rear Left) Body Width 6.10
Resonator (Rear Left) Type Chambered
Resonator (Rear Right) Body Height 6.10
Resonator (Rear Right) Body Length 8.25
Resonator (Rear Right) Body Width 6.10
Resonator (Rear Right) Type Chambered
Sound Level Aggressive / Moderate
Spring Bolt Kit Included No
Sub Category Exhaust and Tail Pipes
Tail Pipe Outlet Outside Diameter 3.00
Tail Pipe Quantity 2
Tail Pipe Tapered Outlet No
Valve Included No
Valve Type Not Applicable
Warning California Proposition 65

Vehicle Fitment

No application/vehicle fitment information available for this product
Vehicle Fitment
Year Make Model Body & Trim Engine & Transmission
( more fitments)
No fitment data available

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