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Flowmaster Force II Dual Catback Exhaust (99-04 V6)

17 Reviews
Our Price

$463.99

  • Item #18420
  • MPN #17275
  • Market Price $572.21
  • You Save 19% ($108.22)
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Customer Photos
Features
  • 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
Description
Flowmaster V8 Style and Sound. Give your V6 Pony that unmistakable Flowmaster V8 sound and power with the Force II Dual Catback Exhaust system. This Dual Catback 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 factory 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 Catback 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 Catback Exhaust system is designed to bolt-on to the existing stock factory Y-pipe on of any 1999-2004 3.8L and 3.9L V6 Mustang.

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
Catback 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
Fitment
  • V6 - 99, 00, 01, 02, 03, 04

Most Helpful Reviews View All

Overall Rating 4.6/5 Write a Review
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) (1)

4/5
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

Read More
Helpful (5) (1)

Customer Photos (10) View All

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Q & A (8 Questions, 5 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 Year: 2004 Model: V6

Question Resolved
Good Question (0) (0)
  • 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.

    Helpful (2) (0)

    Best Answer

    Brice27332 Year: 2007 Model: GT

    Top 250 Contributor

Show 1 more answer

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

cesar Year: 2004 Model: V6

Question Resolved
Good Question (0) (0)
  • Shortie headers will bolt up to your cats. Long tubes will require a new system

    Helpful (2) (0)

    05GTHI Year: 2005 Model: GT

    Top 50 Contributor

Show 1 more answer

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

MARIYOH Year: 1999 Model: V6

Question Resolved
Good Question (0) (0)
  • 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!

    Helpful (1) (0)

    AlecVP Year: 2004 Model: V6

Reviews (17) Write a Review

  • 5 Stars .59 59%
  • 4 Stars .41 41%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.6

out of 5 stars

17 Customers Recommend this Product

Installation Time:Full Day

Installation Cost:0-$100

  • Loudness / Volume: 4.235294 4.2/5
  • Exhaust Note: 4.588235 4.6/5
  • Fit & Finish: 3.882353 3.9/5
  • Bang For Your Buck: 4.588235 4.6/5
Filter By Sort By
  • 5/5

    Nice Tone

    October 09, 2011

    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 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Toledo, Ohio

    Helpful (8) (1)

  • 4/5

    Great aftermarket exhaust for the V6

    December 05, 2011

    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 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Malvern, PA

    Helpful (5) (1)

  • 4/5

    Best Exhaust For A V6 Mustang

    September 24, 2011

    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 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Macomb, MI

    Helpful (6) (2)

  • 5/5

    New Exhaust

    February 25, 2014

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

    TheFugitive

    Year: 1999 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 3

    Helpful (2) (0)

  • 4/5

    Sounds good

    December 01, 2011

    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 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 SSM, MI

    Helpful (2) (0)

  • 5/5

    Looks Like A V8

    December 16, 2012

    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 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Uvalde, TX

    Helpful (1) (0)

  • 5/5

    Sounds better than a V8

    June 11, 2012

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

    Harris

    Year: 2002 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Raleigh, NC, USA

    Helpful (1) (0)

  • 5/5

    A MUST HAVE FOR YOUR V6

    April 27, 2012

    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 Model: V6 Driving Style: Street / Strip 'Stangs I have owned: 1 HEMET CA

    Helpful (1) (0)

  • 5/5

    Very good product

    January 27, 2012

    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 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1

    Helpful (1) (0)

  • 5/5

    This product is a great choice for looks and sound.

    May 27, 2012

    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 Model: V6 Driving Style: Show 'Stangs I have owned: 3 Marion Va

    Helpful (2) (2)

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