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Flowmaster
Flowmaster 2025 RAM 3.0L HO American Thunder Direct Fit Muffler - 818204
Flowmaster 2025 RAM 3.0L HO American Thunder Direct Fit Muffler - 818204
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Flowmaster
SKU:
FLO818204
|
- UPC:
- 090127960738
$699.95
$787.95
(You save
$88.00
)
Other Flowmaster kits for this car
Fits these vehicles
- 2025-2026 Ram 1500Limited, Limited Longhorn, Tungsten
Part details
- Part number
- FLO818204
- Manufacturer part number
- 818204
- UPC
- 090127960738
- Brand
- Flowmaster
- Part type
- Muffler
- Prop 65
- ⚠️ WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov
- Special order
- Yes — ordered in for you; allow extra time
- Instructions
- Installation instructions (PDF)
- Material
- 409 stainless steel
- In the box
- Complete hardware
- Factory styled hangers in the stock locations for an easy installation
Installation guide (from Flowmaster)
Hosted by Flowmaster. Follow the maker's instructions and torque specs.
- Box size:
- 17.00 × 16.50 × 60.00 (in)
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Flowmaster 2025 RAM 1500 3.0L American Thunder Cat-Back Exhaust System - 818199
$1,849.95$2,081.95Free Shipping
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Out of stock
Flowmaster 09-24 RAM 1500 5.7L American Thunder Exhaust System Direct Fit Muffler - 817568
$478.95$538.95Free Shipping
Flowmaster's® American Thunder Direct-Fit Muffler exhaust system for the 2025 - 2027 RAM 1500 with the 3.0-liter High Output engine gives you a great value packed way to help you customize your RAM 1500 to your personality. This performance muffler 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 a 3.00-inch inlet pipe leading into a 409 stainless steel Super 10 based muffler for great sound and maximum performance. The dual exit muffler then connects to the factory tailpipes for a simple and effective performance upgrade. Max dyno gains of 13 hp and 12 lb-ft at the rear wheels 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 - 2027 RAM 1500 3.0L High Output, American Thunder Direct-Fit muffler exhaust system, 409 stainless steel
Flowmaster American Thunder Direct Fit Muffler
- An tuned Super 40 series style chambered muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow
- Kit includes complete hardware and factory styled hangers in the stock locations for an easy installation
- 3.0-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
- Max increases of up to 18 hp and 15 lb-ft over the stock exhaust at the wheels
- Tuned performance muffler offers quality sound inside and outside of the truck
- Lifetime Limited Warranty
- Clearance Item:
- N
- LTL:
- N
- MPN:
- 818204
- Proposition 65:
- Y
- Special Order:
- Y
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Flowmaster
Flowmaster 2025 RAM 3.0L HO American Thunder Direct Fit Muffler - 818204
Flowmaster 2025 RAM 3.0L HO American Thunder Direct Fit Muffler - 818204 FAQ
It is listed for: 2025-2026 Ram 1500. Pick your vehicle on this page to check your exact year and trim.
- Complete hardware
- Factory styled hangers in the stock locations for an easy installation
The maker's installation guide is on this page — see Installation guide under the part details for the step-by-step and the torque figures. Work on level ground with the car properly supported, and torque every fastener to the maker's figure. If the job is beyond your tools, any shop that does this kind of work can fit it.
The sound depends on the muffler and resonator design. A cat-back with a resonator stays closer to stock; an axle-back changes the tone more than the volume. Look for the maker's sound notes or a clip on this page.
Cat-back and axle-back systems bolt to the factory connection points. Headers and downpipes replace the factory pipe at the engine and may need new gaskets and hardware; see What's in the box.
A cat-back or axle-back needs no tune. Headers and downpipes change what the oxygen sensors see, so many cars need a tune or a sensor spacer to avoid a warning light.
Drone depends on the muffler and resonator design and your car's gearing. Systems with a resonator or an X-pipe drone less, and the maker notes when a system is built to be quiet at cruise.
An axle-back or cat-back is a jack-stands job with the right sockets and penetrating oil for rusty bolts. Headers and downpipes take more room and time, and a lift helps.
Most systems include the clamps and gaskets they need; see What's in the box. Reuse a factory gasket only if it is undamaged.
Yes — monthly options show right under the Add to Cart button. Affirm, Klarna, PayPal Pay Later and Snap Finance are offered at checkout, and checking what you qualify for does not affect your credit score.
Install and care: mufflers
Before you start
- Soak the factory flange bolts and hangers in penetrating oil the day before.
- Lay out the sections and clamps against What's in the box before anything goes under the car.
Do
- Hang the whole system loosely first, line it up, then tighten the clamps from the front back.
- Check for leaks at every joint with the engine running before the final tightening.
Don't
- Don't tighten any clamp fully until the whole system hangs straight.
- Don't reuse a crushed or torn factory gasket.