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Flowmaster Force II True Dual Cat-Back Exhaust (05-09 V6)

Market Price $884.99 You Save 12% ($101.89)
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  • Item 18466
  • MPN# 817510

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    Features & Details

    • True Dual Exhaust for the V6
    • Includes X-Pipe, Cat-Back and 60 Series Mufflers
    • 2.25" 409 Stainless Steel Mandrel-Bent Tubing
    • 3.5" Polished Stainless Steel Tips
    • Reuses Stock Catalytic Converters
    • Fits 2005-2009 V6 Mustangs
    True Dual Exhaust. Convert your V6 Pony to a true dual exhaust with the Flowmaster Force II True Dual Cat-Back Exhaust Conversion Kit. This system includes the X-Pipe, Cat-Back, and Mufflers needed to give your Mustang an impressive V8 sound and an increase in rear wheel horsepower.

    Signature Flowmaster Sound. Add the classic Flowmaster sound you want to your V6 without worrying about attracting unwanted attention with a Flowmaster Force II catback. The Flowmaster 60 Series Delta Flow mufflers give your Pony a deep, aggressive sound at wide open throttle, but don't create a lot of interior noise when cruising. They're a great choice for enthusiasts who want to improve exhaust flow and tone without being obnoxious.

    Reuses Stock Cats. The installation of the included Flowmaster V6 X-Pipe will require cutting the factory Y-pipe and reuses the factory catalytic converters saving you money and keeping you smog legal.

    Quality Construction. Constructed from durable 2.25" 409 stainless steel tubing for its corrosion resistant properties, the Flowmaster catback features chambered 60 Series mufflers with massive 3.5" diameter polished stainless steel tips for great muscle car looks and sound. As an added bonus the tips are embossed with the "Flowmaster" logo for true custom styling.

    Application. This Flowmaster Force II True Dual Cat-Back Exhaust Conversion Kit is designed to fit the 2005-2009 V6 Ford Mustangs equipped with the 4.0L V6 engine. Reuses the factory Catalytic Converters.

    Technical Note: This Flowmaster system attaches after your factory catalytic converters to convert your single exhaust to a true dual exhaust from the cats back. Modifications or a new rear bumper valance are required to accommodate the dual pipes. AmericanMuscle recommends a GT Rear Bumper or a Shelby GT500/CS Rear Bumper Cover (sold separately).

    Note: When buying a dual cat-back or axle-back exhaust kit for your 2005 and newer V6 Mustang, you will need to select the "2005+ Mustang 304 Stainless Steel Exhaust Hanger Kit" from the drop down option menu above to properly install your new exhaust.

    Fitment: 2005 2006 2007 2008 2009 Details

    What's in the Box
    • (1) X-pipe
    • (2) Over-axle pipes
    • (2) Muffler assemblies
    • (6) Clamps
    • Installation hardware
    • Instructions
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 2.25" Tip Size: 3.5"
    Muffler Type: Chambered Fitment: 2005-2009 V6 Mustangs
    Will it fit my Mustang?

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    6 Questions / 6 Answers

    Ask a Question

    Does this come with cutout template for rear bumper to convert from single exhaust for 2007 mustang 4.0?


    • The Flowmaster Force II True Dual Cat-Back Exhaust does come with the cutout for the additional exhaust hole in the bumper.


    Helpful (1)

    The price says each, does this mean I have to buy it twice?


    • The price for the cat-back is $759.97. This will include the x-pipe, two over-axle pipes, two muffler assemblies, six clamps, as well as installation hardware. You will not need to buy two kits.


    Helpful (1)

    Will the pacesetter long tube headers pair up with this set up?


    • You will have no problem mating those headers, However you will need a mid-pipe that has a diameter of 2.25 inches.


    Helpful (0)

    I am considering the flowmaster dual exhaust for my 2007 V6 mustang. My car has been lowered, is there any issue with the install due to the lowering. thanks, Larry


    • As long as your mustang has not been lowered more than 2" you should not have any issues. This kit does not hang down much further than the stock exhaust does.


    Helpful (0)

    Does it require a tune and do you have to use premium gas?


    • no to both. they're just exhaust pipes.


    Helpful (0)

    how much horse power would this exhaust add


    • It will add 10 -15 hp max ... And good sound :)


    Helpful (0)

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    Customer Reviews (14) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Loudness / Volume 4.538462 4.5
    • Exhaust Note 4.923077 4.9
    • Fit & Finish 4.307693 4.3
    • Bang For Your Buck 4.615385 4.6

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      October 09, 2017

      Flowmaster force IN True Duel cat -Back exhaust

      Bought this system for my 07 4.0 Sounds really good I have no regrets Love the sound :)


      Year: 2007 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      August 29, 2017

      Great product!

      Everything fit great, clamps all fit didn't need to weld. Sounds great. 100 times better than stock at startup, rev, idle, and while driving. Not obnixous, just loud enough.


      Year: 2006 Submodel: V6

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 06, 2017

      Brought a smile to my face

      I was lost looking at different exhausts for my car. I knew i wanted duels but had no idea what to get. I listened to clips on youtube but that only helps so much because you still dont really get the full effect. I settled on the flowmasters. Shipping was fast. Everything got here in one piece. It cost under $200 to get it installed. The chrome tips out the back look very nice. The garage that installed it said it took alittle time getting them installed right but they finally got it. When i fired it up i knew i made the right choice as i turned and looked at my kid and realized we both had a huge smile on our faces. I am very happy. Thanks AM


      Year: 2008 Submodel: V6

      Helpful (4)

    • 5/5

      July 11, 2016

      Flowmaster Force II

      They have a very nice sound and I am Glad I put them on my 2005 Mustang


      Year: 2005 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      September 24, 2015

      True dual

      Fit was great price wasn't bad at all . It took 3 1/2 hours to install . It sounds perfect not to loud at all . My wife loved it . For our 25th anniversary .


      Year: 2005 Submodel: V6 Dayton Texas

      Helpful (2)

    • 5/5

      Installation Time: Full Day

      September 24, 2015

      Flowmaster review

      The Flowmaster exhaust was a fairly straightforward install. The exhaust sounds great. I get better gas mileage, better airflow, and have a smoothie and cooler running engine. Had to bend the pipe down because they were not welded completely strange but otherwise the Flowmaster exhaust true dual cat system is amazing. Thank you American Muscle


      Year: 2006 Tacoma Washington

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      September 22, 2015

      Exhaust system

      Wow wow wow great sound, great look, great buy. Just what I needed and wanted


      Year: 2005 Livonia mi

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 10, 2015

      Great System

      Mustang is an 08 V6 I had the GT rear bumper cover installed I next ordered the FlowMaster Force II system and took it to my exhaust guys and they installed it for $100.00 plus tax I highly recommend using a shop it went so smooth arrived at 8am and by 9:30am it was done and welded. The system has a great low idle note and normal driving is mellow through the back seats but when you get on it, it screams with a throaty deep 6er note. The install looks great and fits nicely up under the car does not look out of place at all, all the hardware worked as the instructions say and moving the mount is a breeze no need to tap the holes for even the OEM bolts are thread cutters put a bit of oil on the threads and run them up. I also disconnected the battery so the computer would be reset and in learn mode to adjust faster to the new freer flowing exhaust pressures and readings at the O2's. Highly recommended system.


      Year: 2008 Submodel: V6 Dallas

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      August 24, 2014

      Excellent Exhaust for your V6 Mustang!

      I should have done this a long time ago. It makes sound so much better. Especially around 3,000-4,000 RPM just opens her up. As for a bit more HP, probably some but not very noticeable however I wanted it more for the sound and it does deliver but it isn't too loud to attract "unwanted" attention for those who know what I'm talking about.


      Year: 2009 Submodel: V6 Virginia Beach, VA, USA

      Helpful (3)

    • 4/5

      Installation Time: Weekend

      May 26, 2014

      Great sound for a sixer

      Fit-wise, this product was a BEAR to install, had to wait for a second set of hands to coerce it to go in. But it IS possible with little more than a couple jack stands and a jack. The instructions tell you to cut AND grind the supports for the factory y-pipe off, but I didn't want to risk an exhaust leak and it would have required dropping the exhaust at the cats. So instead we cut a couple inches off the BACK of the Scavenger X-pipe and everything fit after that. The over-axle pipes are tricky to get in place, your rear end needs to be WAY in the air with the axle hanging so you have clearance. Recommend a lift, but it's possible to do without one. The first fire up was so worth it! It sounds beefy at startup for a six-cylinder then quiets down after it warms up. I've got stock gears (3.31 rear gear) and it starts to drone at about 85 (80 on the perf tune) but it's got a nice sound!


      Year: 2006 Submodel: V6 Naperville, IL, USA

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      March 21, 2014

      Great rumble behind a 4 liter !

      Sounds fairly loud with a good rumble but not obnoxious to have you crazy. Inside cabin volume went up a little but it sounds amazing ! Great mod and a must have !


      Year: 2007 Submodel: V6 Germantown, MD, USA

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      December 09, 2013

      Sounds awesome!!!!

      I bought this exhaust for my mustang and it sounds awesome. It took about 4 1/2 hrs to install. The only negative thing I have to say about this kit is the fitment sucks. The pipes were too long so we ended up cutting a good inch off the flow master. We dropped the suspension to get the rest of it in. I would definitely weld this kit. We used the clamps, but found out one of them was not keeping tight which made the muffler hang low. 2 screws fixed that but I will be getting it welded soon.


      Year: 2006 Submodel: V6 Phoenix, AZ, USA

      Helpful (2)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      May 23, 2013

      Great Sounding System

      I have always been a fan of Flowmaster. This is a great sounding exhaust during acceleration, at idle it has a nice low rumble but doesn’t have that loud droning at highway speeds. My car was recently struck in the back and I decided to have the body shop install the Flowmaster exhaust over re-installing the Pypes system that was on it before. Came out looking very nice, fit well, especially with the GT bumper cover I had them install. I personally like the Flowmaster a lot better that the Pypes system I had on it before, deep rumble but without being obnoxious. If you like it really loud I wouldn’t recommend this for you. I would usually install this myself but since it was in for bodywork I had them do it while the car was apart. I can only tell you what the shop told me as far as the install, “it was a royal pain to install and took me 3 to 4 hours with a couple guys helping out, but it sounds really nice”. He ended up welding it instead of using the clamps and he dropped the driveshaft and lowered the axle to get it in. Overall I’m very happy with the Flowmaster system, would definitely choose it again.


      Year: 2007 Submodel: V6 CT

      Helpful (7)

    • 5/5

      Installation Time: Afternoon

      April 28, 2013

      Love the sound!!!

      For most people. they want a full on V8 sound with their Sixxer. If you want that, don't buy this exhaust. It makes the 4.0 sound like a very nice V6, with a nice rumble at idle and then brings out the European sound of the V6 when you get on it. For those worried about breaking the 95 dB law in certain states or overseas, this one sits right at 93.2 dB for sound, so it's loud enough to notice, but not loud enough to get a ticket! As for installation, it says direct fit, also says to cut off 12" off the stock exhaust I believe (Put it on over 2 years ago, can't remember exactly), you have to cut more. I would recommend taking it to a shop, it took my wife and I around 6 hours to get it installed correctly (comes with clamps, I welded it instead) and its not the first exhaust job I've done. A pain to put on, but worth it, and the 3" polished tips are nice. Overall, I love it, and will definitely buy Flowmasters again, I would recommend getting it powder coated to keep the rust away, which I will do next time.


      Year: 2009 Submodel: V6 Germany

      Helpful (4)

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