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Flowmaster

Flowmaster 817497 Force II Axle-back Exhaust System

Based on 15 reviews
Condition: New
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$849.95

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Availability: Only 1 left in stock, order soon!
Fulfilled by Magnum Exhaust
Arrives Sunday, Nov 8
Order within 11 hours and 27 minutes

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At a glance

Condition
New
Dimensions
36.7 x 17.2 x 16.5 in
Weight
30.2 lb
Material
Stainless Steel
Vehicle Service Type
Car
Automotive Fit Type
Vehicle Specific Fit
In the box
Flowmaster 817497 Axle-back System 409S - Dual Rear Exit - Force II - Moderate Sound

Features 7

  • Includes Hangers and Hardware for an Easy Installation
  • Mandrel-bent 16 Gauge Stainless Steel Tubing
  • Dyno Tuned for Maximum Performance
  • Moderate Exterior Exhaust Tone

Specs 21

Brand Flowmaster
Material Stainless Steel
Item dimensions L x W x H 36.7 x 17.2 x 16.5 inches
Vehicle Service Type Car
Item Weight 30.2 pounds
Brand Name Flowmaster
Manufacturer Part Number 817497
UPC 700042024209

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

Great except for shipping damage
Style: Base Product
The sound is fantastic. The installation process was incredibly simple and straightforward. I’m thoroughly satisfied with my purchase. However, I must mention that the shipping box was severely damaged. The product itself was scratched, and some of the paint coating had chipped away. I’m not pleased with the damage, but since it’s mounted under the car, it’s not visible. ... show more
Reviewed in the United States on April 11, 2025 by Michael
Good Sound, Difficult Install
Style: Base Product
Spent 3.5 hours installing this axle-back exhaust. I blame the basic instructions provided by flowmaster and my own lack of experience. My fat fingers didn't help in reaching the bolts either. After I tightened the last bolt I backed up to take a look at the final product. The exhaust tips were inches away from being centered. Decided I had spent enough time messing with the system and took the car to my local exhaust shop so they could make the tweaks to center the exhaust. I'm very happy with the finished product, great sound and great looks. The exhaust has a nice gurgle/pop after every shift. ... show more
Reviewed in the United States on September 19, 2011 by MD
Disappointed
Style: Base Product
Review Image by Sabre1010
I would not buy these again. The sound is just okay, and beyond the “Flowmaster” on the tip, I’d be surprised if these are authentic Flowmasters. There is enough rust blowing out the tip that it looks horrible. Mustang is garage kept, and while is has rained a lot lately, the rust is a true disappointment. Spend more and get better. ... show more
Reviewed in the United States on March 9, 2019 by Sabre1010
Oh my gawd... what a horrible sound!
Style: Base Product
Am I the only one who thinks these are horrible? WAY louder than the factory web page and the reviewers imply. Under WOT it sounds like a screaming Japanese motorcycle (which, admittedly is kind of cool as long as you don't want to attract every cop in a half-mile radius), but at moderate acceleration it sounds terrible: boomy, muddy, loud, obnoxious. I was looking for a bit more sound, and a lower exhaust note, but I wanted a clean sound, which these do not provide... especially not suited for a convertible. After one day, I was embarrassed to drive it and put the factory exhaust back on. I'm a 40-something professional driving the refined new Mustang, not a 17 year old in a tin-can Honda. I guess I'm not the only one... I bought these "slightly used" from Amazon, so someone else didn't care for them either and returned them. I hear the Magnaflows might be more what guys like me are looking for, but now I'm a bit gun-shy to try again. However... if years of jacking up your iPod has left you half deaf, and this kind of sound is what you're looking for, I'll say some nice things too. I am not very mechanically inclined, but with a set of ramps and a socket wrench with an extension, I was able to install both these puppies in just 35 minutes. I was able to do so without removing the panhard bar as recommended in the instructions. It took 40 minutes to put the factory cans back in but only because I thought I could do it without removing the panhard bar again, but it's a bit harder to wedge it in going in that direction. After futzing about for 15 minutes I finally decided to remove the two panhard bolts - no biggie - made it much simpler. The tips are definitely nicer than stock, and the mufflers are definitely lighter than the OEMs. Fit was good, and installation pretty easy. And Amazon rocks! Not only do they take it back, but they pay the shipping. Other than my time, no risk to try. ... show more
Reviewed in the United States on May 12, 2011 by Jeff and Wendy
Nice sound
Style: Base Product
These were put on my dad's Mustang V-6 and man do they sound good. You never would've thought a V-6 could sound as good as his does. The installation was very simple, and we really like the idea that we could change back to stock if we need too for car warranty purposes. Great Buy!
Reviewed in the United States on July 16, 2012 by cdw165
So Disappointed
Style: Base Product
Did all the research, listened to various brands of axle back exhausts for the 2010-2014 v6 Mustangs. Decided to go with Flowmaster Force 2. Had them professionally installed on my 2014 Mustang. However, they did not sound like the sound clips I heard on youtube or American Muscle. I am some what disappointed. Yes it has the deep rumble on idle but once it goes above that, break out the fly swatter it begins to sound "ricey". Was hoping for more of a muscle car sound. The drone is horrible. I have to keep it in sport mode to quiet it down. Flowmaster is a good product, but not for my car. ... show more
Reviewed in the United States on May 14, 2015 by kimberly J kachel
Great mufflers
Style: Base Product
I have had these on my car for about a week now and I couldnt be happier. They were easy to put on took about 45 minutes and I am skinny enough I didnt even jack the car up. I am very happ with the easy install and it give it a good tone at highway speed and great tone on take off.
Reviewed in the United States on November 6, 2010 by mancinitony007
Awesome
Style: Base Product
Love the flowmaster sound, it’s incredibly distinct given that I have a bbk catted x-pipe
Reviewed in the United States on January 12, 2020 by PartyCrasher203
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