Flowmaster 817511 Axle-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound
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Availability:
Only 4 left in stock, order soon!
Arrives
Wednesday, Aug 12
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Features
- Includes Hangers and Hardware for Easy Installation
- Mandrel-bent 16-gauge Stainless Steel Tubing
- Large 4.00-inch Polished Stainless Steel Tips
- Aggressive Exterior Exhaust Tone
- Lifetime Limited Warranty
- Axle-back System
Description
Flow master 817511 Axle-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound
Color: Multicolor
Brand: Flowmaster
Material: Plastic
Vehicle Service Type: Car
Shape: Round
Brand Name: Flowmaster
Manufacturer Part Number: 817511
Manufacturer: Flowmaster
UPC: 700042025183
Global Trade Identification Number: 83
OEM Equivalent Part Number: 817511
Part Interchange Info: 817511
Model Number: 817511
Unit Count: 1.0 Count
Manufacturer Warranty Description: Check with the manufacturer
Item Weight: 0.01 Ounces
Included Components: Flowmaster 817511 Axle-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound
Item Type Name: Flowmaster 817511 Axle-back System 409S - Dual Rear Exit - Outlaw - Aggressive Sound
Compatible with Vehicle Type: Car
Installation Type: Bolt-On
Automotive Fit Type: Vehicle Specific Fit
Color: Multicolor
Shape: Round
Material Type: Plastic
Finish Type: Polished
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Aug 12
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Style: Base Product
I was originally hesitant to buy the Outlaws and was leaning towards the American Thunder Classics because people kept saying how loud the Outlaws were and clips I listened to supported that; I also had a CAI and tune on the car which had already enhanced the exhaust note so that raised more concern that it would be overly loud. But, at the end of the day I figured I'd rather it be a bit too loud then be a bit too quiet and be disappointed. And that was the right decision. The Outlaws are loud-though to my ear IN the car they don't sound that loud-don't get me wrong, from stop up to pick your RPM, if you're accelerating you hear these and you hear them good. At idle you hear a decent grumble at all times which is exactly what I wanted yet once you're not accelerating any longer all you hear is a light exhaust note in the car (and I mean LIGHT); the only time these "drone" at crusing speeds, which I happen to like BTW, is at 80 mph and above or approx 2300 RPMs and up. Now, like I said, I have an Airaid CAI and a Steeda tune so the note is even more aggressive than stock but I'm still considering either a catted X Pipe or Off Road X Pipe. My primary concern is I DO think an O/R X pipe with these would be really loud and perhaps too much so for daily driving but I would imagine a very aggressive but tolerable tone with an X Pipe fitted behind the cats. 4 WEEK POST INSTALL UPDATE: The Outlaws are LOUD after about 3 weeks of break in-do not buy these if you don't want heads to turn, your neighbors to make "friendly" comments about your new exhaust, random women to stop you in parking lots and an extra couple notches on the stereo to hear your music. Anyone that is reviewing these and is saying they are not "that loud" have either not installed a Cold Air Intake and/or tune OR they haven't let the Outlaws break in (or they are possibly used to something even louder like Pype Bombs or simply an older car with no mufflers at all). On cold start up with my garage door closed my garage windows visibly vibrate; at wide open throttle these SCREAM-I mean many muffler get quieter after 3000 RPM's, these get LOUDER. I reqularly have people walking AWAY from me on sidewalks nearly a city block away turn and look at me and that's with me light on the throttle under 2000 RPM's. A friend the other night told me he could hear me obnoxiously so as I drove by a local Starbucks-and he was indoors. I've been stopped by two women totally cold in parking lots just this week after I pulled in under normal, light driving conditions to comment on (as one put it) the "pure sexy" that was the sound-my best friend (also a woman) heard them for the first time last week and proclaimed "THAT'S a panty dropper sound". And with ALL that said if you need to keep a low profile, you can but you need to be easy on the throttle and go slow. And that's EXACTLY what I wanted-but not everyone does want that, so you have been warned. When I first put these on I considered an H Pipe or X Pipe to add some kick to the sound, but now I'm glad I waited for the break in-these would be UNBEARABLE on a daily driver with a CAI and H/X pipe. Finally, the "drone" that so many complain of is now very present at any speed over 55-and its always right THERE at 70 and up. Frankly I'm not sure why people don't like that-maybe some have more sensitive ears than me or maybe its just a difference in preference and taste; personally, I want to always have that reminder that 400 HP is 18 inches from my toes on the other side of that firewall...and this exhaust is quite clear about that. I few installation notes: installing these requires jacking the car or preferably putting the rear end of the car on ramps. That along with a socket set is really all you need to install these. One caveat is that you MUST have deep sockets to fit over the bolts AND the extender. It also wouldn't hurt to have a socket wrench with an extendable handle. The biggest issue is the hangar bolt on the forward hangar that is ABOVE the muffle and on the body...you have to remove the other hangar and get the exhaust nice and loose so you can shove the wrench up in there to loosen it. Once the stocks are off, installing the Outlaws is incredibly easy. Total install for anyone remotely familiar with working on cars should take one person about 2 hours max with the hardest part being removing the stock mufflers. The fit and finish are first rate and shipping was quick and well packaged (though I found it amusing that the mufflers are manufactured at the Flowmaster plant 10 miles from my house and were shipped across the country twice to get to me). Pricing was excellent with the 25% off promotion, shipped for under $300. Overall I am VERY pleased-the Outlaws give the Mustang that muscle car sound with a nice deep rumble that is the Flowmaster signature and loud without being glass shattering loud. Highly recommended.
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Reviewed in the United States on March 22, 2013 by Will W. Martin
Style: Base Product
I researched axle-back exhaust for about 2wks, had these in my cart for about a week before I pulled the trigger. I am so happy that I went with these, they sound absolutely amazing on my 2005 GT. Everything else is currently stock on my car, these are definitely louder than the stock axle-back exhaust... But don't believe all the hype about setting off alarms and becoming a police magnet...in terms of exhaust note and volume level, these fall perfectly in the center of not being loud enough and being obnoxiously loud and offensive to neighbors. The exhaust not is nice and deep, you can slow roll through your neighborhood and not bother anyone...but if you stomp it they ROAR! The install wasn't bad at all, we just set the rear of the car on ramps and had plenty of space to work. The driver's side is more difficult to remove than the passenger side...maybe took 2 hrs total with a break included. Honestly could not be happier with this purchase. If you are debating buying these Flowmaster Outlaws, just go for it...you won't regret your purchase. I'm certain if I'd purchased the American Thunder series or any others I would have been disappointed. These are spot on perfect and make the S197 sound exactly as it should, like a muscle car.
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Reviewed in the United States on November 11, 2019 by Dyssolution
Style: Base Product
exactly what i was looking for, had 2 GT Mustangs with muffler deletes but both were very loud during cold start-ups, so loud i would wake the neighborhood. these have just enough suppression to stop that problem perfectly, still a straight thru design so when you jump on your GT500, these mufflers scream. easy installation, the hardest part was removal of stock mufflers due to hidden hanger bolt heads sitting above the muffler, once the originals were out of the way, the outlaws slipped in easily and the tips self aligned in the cutouts nicely. as with all aggressive muffler systems,there is some drone in the cabin at some rpm levels, but if you want your muscle car loud, this is part of life, no exhaust popping with the Outlaws though, which is why i call it an adult exhaust note, you get a nice rumble and growl when you accelerate then let off the throttle. and if you happen to pull up beside an officer of the law, you won't interrupt his coffee break if you stay off the throttle. by far the best Mustang exhaust I've had yet. UPDATE January,2013 still love these mufflers, BUT they do pop when you downshift when COLD.....once they warm up they stop....now i like the pop, you can wake an entire line of morning commuters if you downshift and use the engine to slow yourself down at a early winter morning traffic light. just wanted you all to know about the downshift popping, and they are a good bit louder a few months after install when you stomp on the throttle...perfect!
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Reviewed in the United States on August 26, 2012 by turk390
Style: Base Product
Very good, deep sound. In my opinion not too loud by any means. Gives the Mustang a nice, aggressive sound to match the looks. The hardest part of the installation was removing the original exhaust pipes/mufflers. It took some penetrating oil and muscle to get the original clamps off and to separate the rusted sections of pipe. If using a socket by hand, do yourself a favor and use a long pipe over the socket wrench to provide a lot more leverage. Once the OEM mufflers were removed, the Flowmasters fit perfectly, the hangers were in exactly the right position, and the exhaust tips were perfectly centered in the bumper cutouts. Great sound, easy installation, and I would absolutely purchase these Flowmasters again.
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Reviewed in the United States on August 19, 2018 by Scott
Style: Base Product
LEFT SIDE HANGERS NOT EVEN CLOSE. GO WITH MUFFLER DELETES OR GUT YOUR FACTORY MUFFLERS, BETTER SOUND. ONLY LOUD WHEN YOU GET ON IT.
Reviewed in the United States on April 25, 2014 by scooter
Style: Base Product
I absolutely love these! I have an '08 GT, and while I love it (it's like my baby), it didn't exactly meet the muscle car sound I was looking for. I was torn between these and the American Thunder, but I had my eyes on these and I took the plunge. Wow. My car sounds like a freaking monster! I started up my car leaving the grocery store, and the guy walking behind me was so startled from the sound, he dropped the hotdog he was eating. Heads will turn, people will comment, and your pony will scream. WOT absolutely roars! I can't go under a bridge/tunnel without giving a little gas, and it always sounds amazing. The drone isn't too bad at all; no problems with having conversations or listening to music. If you're on the fence about getting these, then stop worrying and buy 'em. Worth every penny, no doubt about it.
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Reviewed in the United States on August 6, 2014 by rocker1144
Style: Base Product
K, so u if your planning to buy this set of flowmaster sets, and u read some of the reviews, u see that alot of peoples reviews seem to be way out of control, calling this set to be super perfect with the perfect sound. Well im here to tell you that those reviews are completely true..This are GREAT, Easy to install, 30-40mins basic tools, and the sound is AMAZING, yeah..maybe the word AMAZING is short for how great they really are. But ones again, im not a super tech guy or someone trying to sell u this stuff, just your average JOE trying to get his car to sound nice(06 mustang GT) and i really do love the sound they produce, how easy the install was, I actually installed these without having to lift the car or set it up on a rack, was parked on drive way , and decided to give it a shot , BANG, done, only 4 bolts per side to take off and place these new ones in. LOVE EM they are well worth every single penny!!!
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Reviewed in the United States on January 26, 2013 by Amazing customer
Style: Base Product
I recently returned the Pypebombs and received the Outlaws yesterday and bolted them on last night. I am loving it. Low tone rumble when cruising and a kick in the face when I open it up. Precisely what I was looking for. I didn't have to tweak anything around to make sure both sides were centered out of the exits. So much easier than the pypes were.and so much better quality in the FlowMaster brand name. Took me less than one hour with literally with one arm (Shoulder surgery recently on left side) but I hope that paints a clear picture of the ease the Flowmasters provided. The sound is awesome and not obnoxious like the pypes were for me. If you disagree, read the reasons why I returned the pypes on my Pypes pypebomb review. How about a manly tone and rumble when cruising or idling rather than just a freeflow of s*** flying everywhere when idling or cruising? Outlaws is the way to go.
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Reviewed in the United States on May 17, 2013 by Maiki