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Flowmaster Force II Stainless Steel Cat-Back Exhaust (07-18 Jeep Wrangler JK)

Item J25059
Market Price $651.99 You Save 20% ($133.63)
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    Features, Video & Details

    • Cat-Back System
    • 16 Gauge Stainless Steel
    • Black High-Temperature Coating
    • 2.5 Inch Diameter Pipe
    • Mandrel-Bent
    • 3 Inch Brushed Stainless Steel Tip
    • Made in the U.S.A.
    • Stainless Steel Hangers and Hardware Included
    • Flowmaster Limited Lifetime Warranty
    • Fits 2007-2018 JK Wranglers

    Review & Installation Video

    Review & Install Video

    I'm Ryan from and this is my review and installation of the Flowmaster Force II Stainless Steel Cat-Back Exhaust, fitting all 2007 and up JKs. This system will fit both the two-door and the four-door JK and any year JK with either motor. Today we're going to talk through the installation of this system, which is a very simple one-out-of-three wrenches. This will bolt directly in place of your factory exhaust system. We're also going to talk about the construction and a few of the other features.This system is for anyone who wants some additional sound and volume out of the exhaust of their JK. Now, if you have a newer JK that has a resonator, this is going to completely delete that resonator which, of course, will give you some additional volume. The muffler that's used in this system will also create some more volume and a lower exhaust note. As you can see, the muffler does have a high-temp black finish on it which helps to hide the muffler underneath the rear of the jeep. And it does have a polished tip which looks pretty good in my opinion. Now there are systems out there that are lower quality material and less expensive than this stainless system but a stainless steel system like this one is going to hold up a lot better over time than, say, an aluminized steel system will. So you are going to pay a little bit more for the quality of this exhaust system. Now anytime you help your engine breathe either in or out, you can expect to see a little bit of power gains. But this isn't going to be a huge power gainer for you. Any power that you pick up will be toward the top of the RPM range where we don't spend a ton of time. This is going to be more about the sound and the volume. So whether you're just replacing the factory system for the sound or the volume, you've crushed your factory system on the trail, or it's just rotted out, this is going to be a really nice replacement.As it says in the name, this is a stainless steel exhaust system. This is made from 16-gauge stainless, 2 and a half inch diameter tubing that is manually bend. Now what that means is there's a piece that goes on the inside of the pipe as well as the outside of the pipe during the bending process to ensure that the pipe keeps its diameter and it doesn't pinch, which can cause some additional back pressure.This is 409 stainless, which is going to be a higher grade than aluminized steel but not quite as high as a 304. So you can expect to get a little bit of surface rust on this system. However, I would not expect it to rust through like an aluminized system may, at least not in any short period of time. As we said before, this is a high-temp black coating on the muffler, which just helps to hide the muffler a little bit and you do get a polished three-inch tip welded onto this system. Now because this system does fit the two-door and the four-door JK, you have this extension pipe included. If you have a two-door, you're obviously not going to use that. If you have a four-door, you are going to use that, so that is something to keep in mind. You may have a piece left over when you're doing the installation if you're putting this on your two-door JK. And because this is designed to fit on any newer JK with any engine, this pipe here does have two different hangers welded on it because, of course, Jeep did change a couple of things when they changed the motor. So this has both hangers welded on it, which means that this system is going to fit really nicely on your Jeep no matter what body style or what year you have.Flowmaster says that this installation will take you around three hours. I think most of you are going to be able to get it done right around two. And I am giving it a one-out-of-three wrenches on our scale because this will bolt directly in place. Now the first step is, of course, removing your factory exhaust system from the catalytic converters all the way back. And you'll do that very simply by removing a few clamps and popping all of the hangers out of position.You are going to want to spray those clamps well ahead of time with a good penetrating oil to make sure you're going to be able to break them loose. If you've done any exhaust work in the past, you'll know that they can like to get rusty, so make sure you spray them ahead of time. And you can also spray the rubber hangers holding your factory system in place as well. From there, it's just a matter of loosening those clamps, cutting them off if you have to, and getting all of the factory piping, resonator if you have one, and muffler out of the way. After that, you'll start installing all of your new piping from the front. You'll install your pipes using the stainless steel hangers and the clamps that are included in the factory hanger locations. You'll start with this front pipe here, then if you have the four-door the extension pipe. If you have a two-door, you'll leave that part out. Finally, you'll get to the over axle pipe, then the muffler, and finally the tail pipe. Once you have everything hanging in place with the clamps a little bit loose, you can go back, start from the front again, and tighten everything up making sure that everything is level and the tip is exactly at the angle you want it to be at when you're finished up.As I said, this system shouldn't take you more than two hours. You might even be able to get it done a little bit quicker if you don't have a lot of rust or if you've done exhaust work in the past. And you're not going to need any specialty tools, just some hand tools and a good can of penetrating oil. This system does cost around $550, which is right around the same area as a lot of other cat-back systems that are of the same quality. Now, you can get an aluminized steel system that is going to be cheaper just because the materials are less expensive. And you can get systems that are more expensive that are going to be of higher grade 304 standards. But for what this is, I think it's a fairly priced system that sounds pretty good.So whether you're looking to replace a rusted out or crushed factory system or you're just looking to get some additional volume and a lower exhaust note out of your JK, this is going to be a really nice option that will save you some money over the systems that are made of even higher grade material. So that's my review of the Flowmaster Force II Stainless Steel Cat-Back exhaust, fitting all 2007 and up JKs that you can find right here at

    Construction. This U.S. made, Force II by Flowmaster is made out of corrosion resistant, long lasting 16 gauge metal, utilizing 409 stainless steel. The exhaust is shunted swiftly and evenly through this axle-back system by capacious 2.5 inch pipes with 3 inch tips. The heat resistant coating and premium materials are backed by a limited lifetime warranty. Tough stainless steel hangers are also included.

    Designed for a quiet, restrained, pleasant note, the Force II provides a moderate note outside the Jeep and a soft purr inside. Nevertheless, the system amps up performance, cuts fuel expenditure, a power boost, and a more responsive throttle.

    Application. Flowmaster backs this system with a limited lifetime warranty. This system fits 2007-2018 JK Wranglers, both 2-door and 4-door models.

    Fitment: 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Details

    MPN# 817514

    CA Residents: WARNING: Cancer and Reproductive Harm -

    Installation Info
    Tech Specs
    Will it fit my Wrangler?
    • JK Rubicon 2 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
    • JK Rubicon 4 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
    • JK Wrangler 2 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
    • JK Wrangler 4 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18

      Customer Photos (3) Submit Your Photo

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        Questions & Answers (5)

        5 Top Rated Questions

        Hello, Is there any web site that has real time of the sound of this at idle and stepping on the gas?

        • The beginning of our installation video on the product page lends a sound test!

        Helpful (0)

        Are the pipes Stainless Steel? It just says ss muffler hangers

        • The exhaust indeed will be constructed of 409 stainless steel.

        Helpful (0)

        Will this cat back fit 2004-2006 Unlimited? If not would you have one that would?

        • This Flowmaster Force II Stainless Steel Cat-Back Exhaust (00-06 Wrangler TJ) would not fit and 2004-2006 LJ, but these Cat-Back exhaust will fit your LJ: 1. 2. 3.

        Helpful (0)

        What muffler comes with it ???

        • The Flowmaster Force II Stainless Steel Cat-Back Exhaust uses a super 50 series muffler.

        Helpful (0)

        Does flowmaster make a system for a jeep that actually improves horsepower ??? I don't want any drone. This video review says it has a nice sound to it ,but not really any power gains .

        • Hello, all exhaust systems improve horsepower and you will feel a decent gain with this Flowmaster Force II Stainless Steel Cat-Back Exhaust without any drone. Unfortunately we do not offer any Flowmaster system for a JK that makes a substantial amount of HP.

        Helpful (0)
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          Customer Reviews (4) Write a Review

          Overall Rating 4.5

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:0-$100

          • Exhaust Note 5 5
          • Fit & Finish 4.75 4.8
          • Bang For Your Buck 4 4

          • 4/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            April 10, 2019

            Pain in the butt install

            I decided to initially install this myself as I do all my Jeep mods and boy was that a mistake. Removing the old muffler and resonator and pipes were fairly easy. I greased the hangers to make the removal easier and with a little bit of twisting it did the trick. The hard part was getting the new hangers to line up just perfectly. Even with grease and oil I couldn't get the new pipes to fit into each other all the way so in the end the muffler was slightly off. Not to mention I have the Hard Rock edition with dual tow hooks on the back bumper and the exit pipe ended up rubbing up against it which caused rattling. I decided to take it to a professional shop to have it adjusted. They fixed it in under and hour and in retrospect I should have taken it to them to begin with. The shop had to sawzall a piece off the pipes and re weld it but it turned out perfect. The exhaust note is exactly what I was looking for. Nothing overly loud or annoying to attract attention. Just a nice deep aggressive tone.


            Year: 2016Submodel: Rubicon

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            June 18, 2018

            Satified Customer

            Great product, Design is spot on . all the hardware and hanging tabs were perfect. The sound is a little more aggressive than I Expected but is still sounds great.


            Year: 2009Submodel: Wrangler

            Helpful (12)

          • 4/5

            Installation Time: Less than 1 Hour

            May 02, 2018

            Review from Flowmaster Force II Stainless Steel Cat-Back Exhaust (00-06 4.0L Jeep Wrangler TJ, Excluding Unlimited)


            It is quieter than I was expecting but does give a nice sound over all I am happy with it


            Year: 2004Submodel: Rubicon

            Helpful (14)

          • 5/5

            Installation Time: Afternoon

            January 11, 2017

            Sounds Mean

            This exhaust fits perfect, sounds mean, doesnt drone, and looks great with the black muffler section. I wanted the sound and performance without being too loud, having a drone, or being too flashy. This is the ticket. Love it


            Year: 2009Submodel: Rubicon

            Helpful (16)

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