cat-back

Flowmaster 817494 - American Thunder Cat Back Exhaust System

Name: Flowmaster 817494 - American Thunder Cat Back Exhaust System (817494)
Brand: Flowmaster
SKU: 5b00023d259b31d67f87db8c
Price: 993.99 USD
Availability: InStock

$993.99

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In Stock

Ships by 01/31/2023

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Check to see if this fits your vehicle

This part fits

2010 Ford Mustang GT 4.6L V8 cid:281
2009 Ford Mustang Bullitt 4.6L V8 cid:281
2009 Ford Mustang GT 4.6L V8 cid:281
2008 Ford Mustang Bullitt 4.6L V8 cid:281
2008 Ford Mustang GT 4.6L V8 cid:281
2008 Ford Mustang Shelby GT 4.6L V8 cid:281
2007 Ford Mustang GT 4.6L V8 cid:281
2007 Ford Mustang Shelby GT 4.6L V8 cid:281
2006 Ford Mustang GT 4.6L V8 cid:281
2005 Ford Mustang GT 4.6L V8 cid:281

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About this product

Part #: 817494

For the serious enthusiast who is looking for all the performance benefits of a complete Cat-back dual exhaust system, this is it. As an American Thunder system, it delivers an aggressive exterior sound level and a moderate interior tone that is suited to the enthusiast who wants to be heard. With maximum performance and easy fit in mind, the system is mandrel bent and includes specially engineered mufflers featuring Delta Flow technology. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for a simple installation.

More Details

Exhaust Series	American Thunder
Exhaust Type	Dual
Exit Position	Dual Rear
Exit Style	Straight
Heat Shield Attached	No
Inlet Diameter	2.500 in.
Inlet Inside Diameter	3.000 in.
Material	Stainless Steel
Muffler Count	2
Muffler Part Number	Kit Only
Muffler Series	60 Series Delta Flow
Outlet Diameter	3.000 in.
Outlet Outside Diameter	3.000 in.
Single or Dual	Dual
Sound Level	Aggressive
System Type	Cat Back
Tail Pipe Diameter	3.000 in.
Tip Diameter	4.000 in.
Tip Quantity	2
Title	Flowmaster 817494 Cat-back System 409S - Dual Rear Exit - American Thunder - Aggressive Sound
Tubing Diameter	3.000 in.

Additional Documents

See what our community says about flowmaster products

149

David Barrett

1999 Dodge Dakota

What made you choose this particular product?

Installed b4. Simple

What were you trying to accomplish by adding this product?

Performance

Was it easy install? Any installation tips that will help others?

Yes

Once you’ve had a chance to use the product, did it meet your expectations?

100%

View on David's build

Ben Couchenour

1989 Ford Mustang

What made you choose this particular product?

Price and performance

What were you trying to accomplish by adding this product?

More power

Was it easy install? Any installation tips that will help others?

Yes

Once you’ve had a chance to use the product, did it meet your expectations?

Yes

View on Ben's build

162

Josh Hall

1994 Chevrolet Camaro

What made you choose this particular product?

Needed a muffler. Straight pipe was too raspy

What were you trying to accomplish by adding this product?

Better and quieter exhaust note

Was it easy install? Any installation tips that will help others?

Installed at local muffler shop

Once you’ve had a chance to use the product, did it meet your expectations?

Sounds good. Keeps the raspyness under control till about 4000 rpm. Can be a bit drony on the highway

View on Josh's build

457

Jacob Olson

2010 Chevrolet Silverado 1500

What made you choose this particular product?

Cheap, axle dump so clean look, and nice aggressive sound without being obnoxiously loud

What were you trying to accomplish by adding this product?

Mostly for the truck to sound better and a little louder

Was it easy install? Any installation tips that will help others?

Very easy to install Tip: spray the hangers with some lubricant (WD-40) for ease of removing the old exhaust from the rubber and sliding the new pieces in

Once you’ve had a chance to use the product, did it meet your expectations?

Yes great sound and not annoyingly loud

View on Jacob's build

1.5k

Neo Falcon

2001 Volvo S60

What made you choose this particular product?

After doing a good deal of research on different mufflers, and running into Summit Racing Equipment's video on Flowmaster exhaust series comparison video, I decided on this Super HushPower 2 muffler, which ended up being the right choice!

What were you trying to accomplish by adding this product?

My old exhaust system was rusting out (but not severely), so I thought it would be a nice project to get rid of it in favor of a lighter, better-sounding custom setup. I wanted something very sporty, but not aggressive, or too loud.

Was it easy install? Any installation tips that will help others?

Mostly yes because this part of the exhaust project was easier to put up with than the glasspack--both before and after making changes. This one was a bolt-on both times. It is secured with v-bands in case I want to swap it out, or remove it easier when I want to do something in the rear, such as dropping the rear subframe, for example.

Once you’ve had a chance to use the product, did it meet your expectations?

At first, my expectations were rather mixed. It was a bit louder than I expected before installing the glasspack, and the raspiness was more of a thing before I rearranged the exhaust to have the muffler closer to the rear. Moving it to the rear gave it the more preferred low-tone, "burbling" exhaust note I was looking for, but either way, it always sounded good--especially with a glasspack. I was even told by a few people that it sounded like a V10, noticing how similar 5-cylinder and V10 engines sound!

Any additional comments?

Definitely a nice, lightweight, and not-too-loud option for custom exhausts! It is on the quieter-end of the Flowmaster exhaust aggressiveness spectrum after all.

View on Neo's build

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About Flowmaster

Manufacturer of performance exhaust systems, mufflers, cold 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.

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