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Flowmaster Force II Dual Cat-Back Exhaust (99-04 V6)

Market Price $630.99 You Save 13% ($83.02)
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$547.97

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  • Item 18420
  • MPN# 17275

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    Features & Details

    • Classic Flowmaster Super 40 Series Sound
    • Aggressive V8 Look and Sound
    • Bolts Up to the Stock Factory Y-Pipe
    • Durable 2.5" Aluminized Steel Tubing
    • 2.5" Polished Stainless Steel Tips
    • Includes Two Flowmaster Mufflers
    • Fits 1999-2004 3.8L and 3.9L V6 Mustangs
    Flowmaster V8 Style and Sound. Give your V6 Pony that unmistakable Flowmaster V8 sound and power with the Force II Dual Cat-Back Exhaust system. This Dual Cat-Back system improves exhaust flow using Flowmaster's patented chambered super 40 series muffler design for a throaty, aggressive exhaust note.

    No Cutting or Welding Required. Unlike so many other aftermarket V6 dual exhaust kits that require cutting and welding the stock Mid Pipe, the Flowmaster Force II system simply bolts right up to the stock Y-pipe for a no hassle installation

    Quality Construction. Constructed from mandrel bent 2.5" 16 gauge aluminized steel tubing for it's corrosion resistant properties, the Flowmaster Force II Dual Cat-Back features (2) Super 40 Series chambered mufflers with 2.5" diameter OEM style polished stainless steel tips for great muscle car looks and sound.

    Application. This Flowmaster Force II Dual Cat-Back Exhaust system is designed to bolt-on to the existing stock Y-pipe on of any 1999-2004 3.8L and 3.9L V6 Mustang.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    What's in the Box
    • (1) Y-Pipe / Muffler Assembly
    • (2) Tailpipes
    • (1) Muffler Hanger
    • (2) Tailpipe Hangers
    • (6) Hanger Keepers
    • (2) Clamps
    • (2) Rubber Hangers
    • (4) Bolts
    • (4) Washers
    • (4) Nuts
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: Aluminized Steel Tip Material : Polished Stainless Steel
    Piping Size: 2.5" Tip Size: 2.5"
    Muffler Type: Chambered Fitment: 1999-2004 V6 Mustangs
    Will it fit my Mustang?
    • V6 - 99, 00, 01, 02, 03, 04

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    Customer Photos (13) Submit Your Photo

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    20 Questions / 8 Answers

    Ask a Question

    how will these sound i have a stock 02 mustang and was thinking about buying this dual conversion kit but wondering if it would sound deep and aggressive or more like a ricer.

    marc73

    • It definitely does not sound like a ricer. It has that deep, aggressive sound that a V8 has. Exactly what you'd want to hear from a dual exhaust. I have an almost stock (cold air intake) 03 mustang with this exhaust system, and I usually get asked if my stang is a V8.

      Flaco12

    Show 2 more answers Helpful (9)

    Will this pass the California smog test if this is the only mod I install?

    Rodeo15

    • The Flowmaster Force II Dual Cat-Back Exhaust (99-04 V6), should not effect a smog test. Generally, any mufflers or cat-back exhaust modification will not effect smog tests. Only mid-pipe or bolt on engine modifications will needs a CARB EO# approval for use in California. However, do be sure to check your local inspection, emission and noise regulations prior to ordering.

      JoshAM

    Helpful (2)

    I have a 2002 V6 mustang hardtop, I'm wondering how this exhaust sounds inside of the car, mainly does it drone at all? My exhaust is stock other than BBK shorty headers

    Crashin

    • Hello! The Flowmaster Force II Dual Cat-Back Exhaust should not give you much of a drone. With the BBK shorty headers, and this exhaust combo, you will be able to hear the exhaust much better.

      JacobC

    Helpful (1)

    Are the tailpipe hangers what allows the tailpipe tips to hang below the stock V6 bumper? If so, are those hangers available separately for use with a V8 exhaust system to be installed on a V6? Or are these V6 tailpipes, passenger and driver side available separately?

    Bogey

    • The Flowmaster Force II Dual Cat-Back Exhaust includes tailpipe hangers that will allow the pipes to hang slightly below the bumper. We currently do not carry them separately.

      AshleyK

    Helpful (0)

    I want to get the BBK short headers ,try to get the ceramic ones, but what Y pipe would u recommend if anything? Or what do u think should put for the exhaust? Right now it's stock but I gotta fix my headers so I might as well do the whole switch.

    JuanR

    • The Flowmaster Force II Dual Cat-Back Exhaust is designed to bolt on to the stock y-pipe. The BBK 1-5/8 in. Chrome Shorty Headers, item # 56044, (https://www.americanmuscle.com/bbk-shorty-headers-9904v6.html) is designed to be a direct replacement. We cannot guarantee that these exhaust components will be a direct bolt on to an aftermarket y-pipe.

      AshleyK

    Helpful (0)

    For this, what would be the best, short or long tube headers? And what else would I need?? I'm not much of an expert

    JuanR

    • This Flowmaster Force II Dual Cat-Back Exhaust would work for both shorty and long tube headers as long as they merge into the y-pipe located in this exhaust. This exhaust comes with everything needed for replacing the stock exhaust.

      AMJEFF

    Helpful (0)

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    Customer Reviews (30) Write a Review

    Overall Rating 4.6

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:0-$100

    • Loudness / Volume 4.172414 4.2
    • Exhaust Note 4.586207 4.6
    • Fit & Finish 4.137931 4.1
    • Bang For Your Buck 4.689655 4.7



    • 5/5

      Installation Time: Afternoon

      October 09, 2011

      Nice Tone

      The Flowmaster Catback took me and my uncle about 3 hours to put on in total. Didn't run into a whole lot of problems, the only thing we had to change was to drill the wholes by the y-pipe larger to make it fit easier. A little help with getting the tail pipes through is to raise your frame not your axle to give you more room to wiggle the tail pipes through. Huge change, noticed a nicer louder noise right as I pulled out of the garage. Great tone around 3 RPM's. Great buy!

      MikeBlaze28

      Year: 2004 Submodel: V6 Toledo, Ohio

      Helpful (13)

    • 4/5

      Installation Time: Afternoon

      September 24, 2011

      Best Exhaust For A V6 Mustang

      I have a 1999 V6 mustang and I was searching for months for the best sounding exhaust for my car. I didn't want that ricer sound when it gets to high rpm's. Then I found this exhaust system. This exhaust sounds great! I would compare it to a stock gt, but a little louder. My car is a gt clone and people actually think it has an 8! I also added bbk headers and it sounds even better! I only gave this product 4 stars just because it was a little pain to put in, and the end pipes arent 100% equal length. But for the price and how they sound there awesome! I'll recommend them to anyone! I think they sound so good beacuse of how it hooks to the y-pipe. It kinda acts like a x-pipe in a way.

      SVPal88

      Year: 1999 Submodel: V6 Macomb, MI

      Helpful (11)

    • 4/5

      Installation Time: Shop Install

      December 05, 2011

      Great aftermarket exhaust for the V6

      My mustang was hit and ran by a GMC Yukon (yeah, ouch); it backed into the rear of my car after trying to make a U- turn on my street. (He pushed it about 50 ft., then ran into brick pillars, destroying a neighbors porch and somehow managed to get away, but was caught the next morning). Needless to say, I needed an entire new rear bumper, trunk, spoiler, taillights, and an exhaust. This prompted me to go for a dual exhaust system. I chose Flowmaster for the reputation, and because my older brother has an '06 GT with Pypes, which I thought were too loud for my taste, and my dad has an '08 GT with Flowmasters which sounded very nice. The body shop went for the GT bumper replacement for my car (without the lettering stamped into it), understanding I wanted them to put in a new dual exhaust. Anyway, the exhaust, they said, fit great and went in easy. (They also said a GT exhaust would bolt right up as well?? Check on that, something to consider). It sounds at least 10x better than the original exhaust. It's no V8 exhaust sound, and I wouldn't want it to be. The only problem was that the exhaust was made for a V6 and hangs lower than where it should if one has a GT bumper on their V6. This was expected, but I also expected the shop to be able to adjust/weld it accordingly. They did not and refused to modify it, so I will take it to a Midas or similar shop soon to get it where I want it. It looks pretty silly hanging lower than the cut outs. Overall, I am very pleased with this exhaust.

      Stang41

      Year: 2004 Submodel: V6 Malvern, PA

      Helpful (7)

    • 5/5

      Installation Time: Less than 1 Hour

      September 26, 2016

      Well worth it

      It is not as loud as I would have hopeb but still sounds great and easy and quick to install

      X1xdawgx1x

      Year: 2003 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      September 22, 2016

      GREAT PRODUCT!

      This exhaust gave my mustang a great look and sound! I highly recommend this product!

      RStang29

      Year: 2004 Submodel: V6

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      August 19, 2014

      This great for the V6 owner

      Awesome sound! Easy installation, highly recommend for V6 owners looking for great sound from their stang!

      Sarge204

      Year: 1995 Submodel: V6 Endwell, NY, USA

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      August 12, 2014

      Flowmaster Dual Exhaust Conversion on my 2000 V6

      Very happy with my exhaust. My car is a totally stock (minus exterior mods) 2000 V6, so someone with a CAI or other parts might have a different experience. Best way to describe is by pros and cons. Pros : Nice tips with the flowmaster lettering. Sounds way better than stock. Once my stock exhaust was off this kit bolted right up, no bending or fabricating required (slight unevenness, see cons) Free shipping for a pretty heavy package. Cons : When i first start my car it idles at 1500 RPM for about 30 sec - 1 min, then drops down to normal, it has always done this, even before the exhaust, but this exhaust makes a slightly annoying droning sound at 1500 RPM. Not a big deal, just is uncomfortable to my ears. One of the mufflers (the right one I believe) hangs an inch or so back from the other muffler and it makes the final product look a little silly. The right exhaust tip is hidden by my bumper whereas the left one sticks out slightly. You can hardly tell until you are right up on the car. I'm sure this wouldn't be hard to fix with some hammering or bending, but out of the box it is a bit off. I will try to post pics of it ASAP so everyone can see what I mean. Side note - Do not let any mechanic tell you this kit doesn't fit your car. I had 2 separate shops tell me that this wasn't made for my car because they didn't understand how the brackets/hangers worked. I had to show them the included instructions and diagram for them to understand how it works. Don't be shy! I was embarrassed to tell the mechanic he needed to follow the instructions, but once I did he understood and had it on in less than 45 mins.

      Jorson88

      Year: 2000 Submodel: V6 Portland, OR, USA

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      March 03, 2014

      great

      nice look .. new sound. great buy.. i would recommend this product

      killinva

      Year: 1999 Submodel: V6 Norfolk, VA, USA

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      February 25, 2014

      New Exhaust

      After the stock setup, this just makes me grin every time I start her up :)

      TheFugitive

      Year: 1999 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      December 19, 2013

      Product was decent

      Flowmasters sound great. Fitment was a little tricky. Had to heat and bend right pipe a little to keep in off of the the axel support. Nothing major, just to avoid damage going down the road. Pipes sound great, really kicks in around 3000 rpms.

      TheGeneral2002

      Year: 2002 Submodel: V6 NJ

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      November 24, 2013

      Flowmaster force 2

      This exhaust kit is well worth the money. Its doesn't get a true v8 noise but it does however give it a good tone. The pipes weren't perfect size. i recommend to take it to a shop. Install was $100 and fast within 30 minutes. If looking for a similar v8 noise, you will need some headers and either h or x pipe.

      Bryan06

      Year: 2000 Submodel: V6 Oklahoma City, OK, USA

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      December 16, 2012

      Looks Like A V8

      This exhaust gives my stang the original look of a V8 stang. It fits very well and it almost has the sound of a V8. Not as loud, just because its a 6 cylinder. But still so much more aggressive than the stock exhaust. I have had no problems, and only received compliments from this exhaust. It's a must have for any V6.

      Flaco12

      Year: 2003 Submodel: V6 Uvalde, TX

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      June 11, 2012

      Sounds better than a V8

      Shop install was $80, the look, feel, and acceleration of my V6, priceless!

      Harris

      Year: 2002 Submodel: V6 Raleigh, NC, USA

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 27, 2012

      This product is a great choice for looks and sound.

      The Flowmaster catback II Duel Exhaust system was a great choice for my 2004 Mustang. I have a 3.9hp engine and it made it rumble llike the V8 AWSOME! The Flowmaster exhaust fit on my car very clean and snug.All the parts were very easy to install hangers were perfect and I am very Proud of the way it turned out. Thank You !

      Chuck12

      Year: 2004 Submodel: V6 Marion Va

      Helpful (3)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      May 27, 2012

      Great sounding exhaust

      The exhaust looks and sounds great and would recommend it for anyone wants to make their V6 to sound like a V8, I would also recommend that you have a shop install the exhaust unless you have a way to bend the pipes so they fit correctly up under the car and look the same at the back of the car.

      DRMorrell

      Year: 2000 Submodel: V6 NY

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      December 01, 2011

      Sounds good

      Putting the exhaust on is a 2 or more person job. In order to get the pipe over your axle you have to raise your car up and wiggle it threw. Takes one guy to hold the exhaust up because they weigh alot and one to try and get the pipes together, which dont go together easy. I recommend grinding it a little. I'm glad I was able to use a pit at a local Quaker State. The sound of the car changed instantly.

      aclow33

      Year: 2002 Submodel: V6 SSM, MI

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      April 29, 2017

      Great Exhaust

      This exhaust is one of the best exhausts you can buy for a new edge V6! The install took me and 2 other people around 3 hours with a lift. We only had a little bit of trouble getting it to fit around the axle on the passenger side, but with a bit of maneuvering we got it in place perfectly. Now in my personal opinion, this exhaust will only make your V6 sound like a V8 at low RPMs. (around 1-2.5) otherwise it sounds like a 350Z or a 370Z. (especially around 2.5-3.5) Even thought it doesn't sound like a V8, it still sounds very very good! Also it is not as loud as I expected but that is ok because this is my daily driver and I personally don't want a very loud exhaust and I can always take out my cats if I want it louder. Also it does not "drone" at all. Overall this is a very good exhaust and i highly recommend it to anyone new edge V6 owner looking for a new exhaust.

      Crashin

      Year: 2002 Submodel: V6

      Helpful (2)

    • 4/5

      Installation Time: Afternoon

      December 17, 2016

      Nice clean tone

      Let me start by saying I love the note this exhaust puts out its exteremly clean and really enhances the motors sound rather then sound like all pipes like a lot of mustangs these days. Fitment wasn't too bad other then having to mess around with the lift to get the axle to raise so we could get the x pipe bolted to the stock pipe. Other then that just 2 21 year olds and less then 2 hours to install. Overall great product I always wanted this exhaust system. Only downside is between 25-33 rpm the tone sorta cuts out. So keep on rippin it and it sounds great 100 of the time!!

      Raddhaddz

      Year: 2002 Submodel: V6

      Helpful (2)

    • 5/5

      August 17, 2016

      exhaust

      I like the sound I got not load but deep and my response is wild but it is only v6 , I am happy

      dmiller57

      Year: 2000 Submodel: V6

      Helpful (2)

    • 4/5

      Installation Time: Full Day

      February 12, 2016

      Great sound, not so great fit.

      Overall i would recommend this exhaust. going from a stock to this is quite the improvement. I noticed an increase in horse power simply because it didnt get choked up in the higher rpms the way the stock exhaust did. the exhaust as loud as a gt with a very nice deep pur and a rumble while idling. Do not let under estimate the difficulty of putting an exhaust like this together. I recommend a lift but if you don't own one jack up both the back axles. although it was difficult ALMOST everything fit fine. the screw holes on the new exhaust did not match up with the screws coming from the old exhaust pipe. I had to drill new holes to make it fit.

      Grant

      Year: 2000 Submodel: V6 Omaha, NE

      Helpful (2)

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