We’re sorry. The information you have requested is temporarily unavailable.
Flowmaster Exhaust Systems Part #817423 Customer Reviews
15 Customer Reviews
Reviewed by John M H (SUFFOLK, VA) Reviewed for a 2008 Dodge Ram — Jan 10, 2018 7:29 AM
I had a shop install the Cat Back American Thunder system on my RAM, 5.7 Hemi. This was a "replacement" for a system that came with the truck when purchased used. My son and I can not get over the marked difference in sound and performance with this new system. It is like driving a new truck. The engine runs smoother and operates like it has another 40 horses under the hood! At idle, the sound is barely noticeable in the cabin. Acceleration is the sound of new power. Great purchase!!!
Reviewed by Kris N (Snohomish, WA) Reviewed for a 2008 Dodge Ram — Dec 08, 2017 8:18 PM
Always love Flowmasters and have had them on our family's trucks for years. Flowmaster sales and customer support folks are absolutely the best! Really nice system and pretty dang easy to install with simple tools. Make sure you have a breaker back and a deep 15mm socket for the install. Feedback: The exhaust tips wouldn't tighten enough, so have to tack them probably. Clamps have to be adjusted to the right position or you have small exhaust leaks which is slightly tedious.
Reviewed by Konrad S (Kewaunee, WI) Reviewed for a 2008 Dodge Ram — Mar 07, 2017 7:10 AM
Had to get rid of the stock exhaust. Always was a fan of Flowmaster. Installed it and noticed a 1+ mpg increase as long as I keep my foot out of it. Nice sound, not too loud that every cop will hear me but loud enough to be noticed.
Reviewed by David M (Nashua, NH) Reviewed for a 2008 Dodge Ram — Jan 03, 2017 6:06 AM
The system looks and sounds very good. Two changes I would like to see is that the: Muffler in the Stainless Kit should be made of Stainless also, And the 3" tube should go all the way up to the Cat/Headers. I purchased a 5 ft length of 3" SS tubing for $45 on ebay to do this. This only needed to be swagged to 3" ID by a local Muffler Shop.
Reviewed by Chad D (Des Moines, WA) — Sep 12, 2015 9:34 PM
Took me and a buddy just over an hour to do the job once the truck was raised. All the clamps worked great. Seemed a little close to the spare till we wiggled and twisted everything al little tighter. Just don't clamp everything all the way down till it is all hanging and right where you want it. My only complaint is that my chrome tips turned golden after taking a trailer up a few mountain passes. performed great though. I just have golden pipes out the back now.
Reviewed by Steven Y (Tully, NY) — Apr 25, 2015 10:12 PM
This is a real nice kit! Well thought out and constructed! Everything sounds awesome, a little louder than stock.I put it on my Hemi QuadCab. Nothing sounds nicer than that Mopar sound!
Reviewed by Christopher R (Sneads Ferry, NC) Reviewed for a 2008 Dodge Ram — Nov 19, 2013 3:18 AM
Bought this Cat-Back kit form my 2008 Dodge Ram 1500. Had the old one off and the new one on in about an hour and a half, and it only took that long because the band clamp bolts on the original one where stuck on there good. This kit fits perfect, no modding required. Gives a deep rumble sound which is what I wanted. Could be a bit cheaper for what it is but its one of the cheaper ones already that's Stainless. Make sure you give about a 1" weld on all pieces to prevent them from vibrating off.
Reviewed by Daniel S (EL MIRAGE, AZ) Reviewed for a 2008 Dodge Ram — May 14, 2013 6:18 AM
Exhaust is a great value. Gives a nice rumble. There is some noise in the cab, but I like it. Not as aggressive sounding as I had hoped, but I'm sure after I get a tuner and my CAI I'll be very happy. Overall a nice exhaust!
Reviewed by Brendan S (Rocky Point, NY) Reviewed for a 2007 Dodge Ram — Dec 13, 2012 7:02 AM
Nice exhaust, took about 2.5 hours to slap up with hand tools. Nice clean install not to fond of the clamps, i like the other u clamp style that really crimps on the pipe but not a big deal. With out a doubt getting more push out of my hemi and also having that great deep clean sounding mopar purr. Haven't noticed anything with gas really still in the range of 13 to 13.6 mpgs. Think it went down a point or two only because I keep hitting the gas to here it more. Very very happy with it so far.
No minimum order required!
Click to save
Click to enter your email address to receive an
instant personalized ONE-TIME use only promo code!
This policy applies only to activities AutoAnything.com engages in on its website and does not apply to AutoAnything.com activities that are "offline" or unrelated to the website.
AutoAnything.com collects certain anonymous data regarding the usage of the website.
This information does not personally identify users, by itself or in combination with other information, and is gathered to improve the performance of the website.
The anonymous data collected by the AutoAnything.com website can include information such as the type of browser you are using, browsing patterns,
originating web pages, number of visits to AutoAnything.com, vehicle selections, items viewed, pages viewed, and the length of the visit to the website.
You may also be asked to provide personally identifiable information on the AutoAnything.com website, which may include your name, address,
telephone number, and e-mail address. In addition, if a purchase is made, we collect credit card information, billing and shipping address, other customer information,
vehicle information, information regarding prior purchases, and information concerning the dollar amount of the purchase, the date of the purchase, and the specific items purchased.
This information is collectively referred to as "personally identifiable information."
This information can be gathered when feedback or e-mails are sent to AutoAnything.com, when you register for services,
when you voluntarily post information in chat rooms, blogs, message boards or other public forums on AutoAnything.com, when you make purchases via the website,
or when you enter information in the checkout process but do not complete your checkout. In all such cases you have the option of providing us with personally identifiable information.
You may always choose not to provide us with your personally identifiable information, but you then may not be able to participate in the particular activity that requires such information.
If you do provide us with your personally identifiable information, you agree that we may contact you to provide you with information we believe may be of interest to you.
✔ will be deducted from the price at checkout.
Your special offer has been activated and is ready to be used. Your savings will be reflected in cart.
ONE-TIME use only.
HURRY: Expires on
Ships Between 2/23 - 2/27
- What Do You Drive?
- Style:Dual rear/dual side exit (409 Stainless)
- Part #:817423
- 3" Headpipe, 2.5" Tailpipe
- Single inlet, dual outlet 50 series H.D muffler
- 3" logo embossed stainless tips
- Includes exit pipes for dual rear or dual side exit
- Made in USA
- Lifetime Limited Warranty
- Download installation instructions (PDF)