Flowmaster 817417 Cat-back System 409S- Dual Rear/Side Exit - American Thunder - Moderate Sound
Key features
- •Mandrel bent 16 gauge stainless steel tubing
- •Moderate Sound exterior exhaust tone
- •Includes hangers and hardware for easy installation
- •Dyno Tuned For Maximum Performance
Flowmaster 817417 Cat-back System 409S- Dual Rear/Side Exit - American Thunder - Moderate Sound
List Price: $1098.51$988.66DEALYou Save: $109.85 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 23, 2026In Stock (7)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.3
out of 5
Based on 10 reviews
5★
50%
4★
50%
3★
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Price
Rick L.✓ Verified Purchase•September 5, 2023
Sounds Awesome.
The legit low down on the Flowmaster's 817417s
T & A Morgan✓ Verified Purchase•August 31, 2023
Here are my thoughts on the Flowmaster's....
I installed these bad boys on my 05 F150 FX4. (inline with a AFE Silver Bullet Throttle Body Spacer and a K&N Cold Air Intake) The installation process was a piece of cake. It took my friend and I only just a little over an hour to install. The instructions were straight forward and very easy to understand. This particular one was made for my truck. So, I guess that goes without saying. I could have installed them myself within a couple hours. I didn't even have to use any stands or lift the truck. But then I did have plenty of space underneath my truck to work.
I do suggest that if you get them, that you familiarize yourself with the layout of the pipes and what your stock pipes look like. This will be very helpful. But then were guys.....we don't need instructions.
I would have given them a 5 star rating, but was a little surprised at how quiet they are. I was hoping for a more aggressive sound from this setup. My partners 99 Silverado's stock pipes are still louder. (He just won't let it go) But then I'm not sure what the pipe diameter is for his truck or if he's running double in double out. Mines a 3" single in, double 2-1/2 out.
The tone is smooth and there is hardly any sound resonance in the cab. I guess I still need for them to burn in some. At least that is what I am told.
As for performance, there is a considerable difference from before. I noticed an increase in throttle response and horse power. I can't say anything about better mileage as I have not tested that part out yet.
In a nutshell, they are way worth the price spent. If in the future, I'm still not happy with the sound. Then I will just replace the muffler. They all pretty much run the same price. (Anywhere from 55-70) But in any case, I'm very happy with them.
I installed these bad boys on my 05 F150 FX4. (inline with a AFE Silver Bullet Throttle Body Spacer and a K&N Cold Air Intake) The installation process was a piece of cake. It took my friend and I only just a little over an hour to install. The instructions were straight forward and very easy to understand. This particular one was made for my truck. So, I guess that goes without saying. I could have installed them myself within a couple hours. I didn't even have to use any stands or lift the truck. But then I did have plenty of space underneath my truck to work.
I do suggest that if you get them, that you familiarize yourself with the layout of the pipes and what your stock pipes look like. This will be very helpful. But then were guys.....we don't need instructions.
I would have given them a 5 star rating, but was a little surprised at how quiet they are. I was hoping for a more aggressive sound from this setup. My partners 99 Silverado's stock pipes are still louder. (He just won't let it go) But then I'm not sure what the pipe diameter is for his truck or if he's running double in double out. Mines a 3" single in, double 2-1/2 out.
The tone is smooth and there is hardly any sound resonance in the cab. I guess I still need for them to burn in some. At least that is what I am told.
As for performance, there is a considerable difference from before. I noticed an increase in throttle response and horse power. I can't say anything about better mileage as I have not tested that part out yet.
In a nutshell, they are way worth the price spent. If in the future, I'm still not happy with the sound. Then I will just replace the muffler. They all pretty much run the same price. (Anywhere from 55-70) But in any case, I'm very happy with them.
Nice Pipes
Gregory Richard✓ Verified Purchase•August 4, 2023
Excelent product The UPS truck arrived at 11:30 system was installed and my Lincoln Mark LT was on the road before 3:00. Perfect fit. Only comment (just advise) READ THE DIRECTIONS CAREFULLY FIRST. It will save you some time. The chrome tips are real nice and I did tack weld them on just to be safe. The sound from my 5.4 is perfect. Great compliment to my Hot Rod Lincoln Mark LT.
Make sure the back end piece where the tail end connects is bent correctly before being installed.
Mike✓ Verified Purchase•July 29, 2023
The product looked amazing after being installed. Only issue I ran into is the shop couldn't get the driver side to mount where it should cause the piping was bent incorrectly. It is about 1/2 inch just below the spare tire an point out left instead of straight back.
Works very well
JM Singletary✓ Verified Purchase•July 22, 2023
They sound great i put them on in about 2 hours. you will have to cut a piece of pipe but thats the hardest thing. I also found that i got a mile to a mile and a half better to the gallon. I have my laptop on my truck so i no that for sure. I would buy it again and i would never get it done at a muffler shop you will loose performance and sooner or later it will leak. this one is like the factory just better.
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