WIN $5,000 For Your Mustang! Enter Now
Talk to a Mustang Expert
1-888-332-7930
Mon-Thu 8:30a-11p, Fri-Sun 8:30a-9p

Free Shipping on Everything. Seriously. Details

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

Market Price $602.26 You Save 12% ($69.29)

$532.97

FREE Shipping
  • Item 18420
  • MPN# 17275

In Stock Ships same business day. Choose options to add to cart

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

Most Helpful Reviews

5/5
GREAT PRODUCT!

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

Helpful (1)

5/5
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 ...

Read More
Helpful (8)

Overall Rating 4.6 out of 5 stars
Read All 23 Reviews

Customer Photos (11) Submit Your Photo

View All 11 Photos

You Might Also Like

11 Questions / 9 Answers

Ask a Question

can you switch this exhaust to an x pipe when ever your ready? I have a y pipe right now I'm ready to upgrade.

Nickdarippa

  • It may require some additional fabrication, but it is possible. Doing so may change the sound and the tone of the exhaust though. Depending on your skill set, you may or may not be able to do this at home. If you are handy, you might be able to do it yourself but you might be required to take it to a professional shop to get it done.

    Brice27332

    Good Answer (2) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

Would this fit fine even though i have a gt bumper? Like will the mufflers hang or fit perfectly?

MARIYOH

  • you bet your mustang's gt rear end it will! as long as you don't have some sort of aftermarket rear suspension you'll be good!

    AlecVP

    Good Answer (1) (1)

Answer This Question I need this answered (0) (0)

Could you use this exhaust kit with the rear bumper with the cut outs for dual exhaust?

adipanni

Answer This Question I need this answered (0) (0)

Conversion? This might sound silly, but all the other V6 dual exhausts say "conversion kit" so do I need to purchase one of those before putting this on? If not then what's the difference? Other than about $200

TyGuy

  • This is basically a dual exhaust cat-back. It's not a true conversion because you still retain your factory Y-pipe up front. If all you ate interested in ate looks, this kit will work fine. For the best performance, however, you will want a full true dual setup. Headers to X-pipe to cat-back. Hope this helps.

    SOLIDSSSNAKE

    Good Answer (1) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

If i get this system do i need to get a hanger kit like the mac exhaust?

VN562

  • You should not need a hanger kit with the Flowmaster Force II Dual Cat-Back Exhaust, it should be a direct bolt on with no problems.

    SalC7

    Good Answer (0) (0)

Question Resolved

can u put headers?? can u put headers, prefferably long tubes after u put the dual flowmasters exhaust system??

cesar

  • Shortie headers will bolt up to your cats. Long tubes will require a new system

    05GTHI

    Good Answer (2) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

More Products You Might Like

Customer Reviews (23) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Full Day

Installation Cost:0-$100

  • Loudness / Volume 4.272727 4.3
  • Exhaust Note 4.636364 4.6
  • Fit & Finish 4 4
  • Bang For Your Buck 4.681818 4.7



  • 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 (1) (0)

  • 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 (8) (1)

  • 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 (5) (1)

  • 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 (6) (2)

  • 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 (2) (0)

  • 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 (2) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 5/5

    Installation Time: Afternoon

    April 27, 2012

    A MUST HAVE FOR YOUR V6

    The best thing I have ever bought for my car. I made the right choice. Sounds clean and not to loud and people will notice u and will asks what u got.

    MEGAMAN8

    Year: 2001 Submodel: V6 HEMET CA

    Helpful (1) (0)

  • 4/5

    Installation Time: Afternoon

    March 20, 2012

    pros and cons..

    Install was pretty easy me and a friend Installed the system in the back yard on jack stands with a case of beer... Pros, Looks alot better then the stock single weak pipe, Sounds great around 3000 rpms, Better flow= more hp but i guess a tuner will show that, Cons, Not exact equal lenths (but not horrible) Only real sound is around 3000 rpms Hangs very close to driveshaft Overall I would buy it again, The look it gave the car is worth the 440, and i do like the fact that you don't get that ricey sound.

    Supercoupe

    Year: 2000 Submodel: V6 Hagerstown, MD

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    January 27, 2012

    Very good product

    The set came fast and installation was pretty easy. Im new with this stuff but I thought it was a pretty solid setup. The hardest part was making everything align perfectly but enough hammering did the job. Sounds nice and clean like a GT. Very happy with results!

    Jdizzle91

    Year: 2000 Submodel: V6

    Helpful (1) (0)

  • 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 (2) (2)

  • 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 (1) (1)

  • 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 (0) (0)

  • 5/5

    September 19, 2016

    Flowmaster rules

    Very pleased with the Flowmaster Force ll cat back. The quality of the components was top rate. The tailpipes were bent exactly as needed for proper routeing all the way back. All the hardware was top rate also. I installed it on a lift where I worked before retirement. I would strongly recommend a lift for installation. an take your time for a perfect installation. they sound an look great. took me 2 hours.

    retiredmarine

    Year: 2003 Submodel: V6

    Helpful (0) (0)

Related Mustang Categories