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Flowmaster Force II Stainless Steel Cat-Back Exhaust (97-99 Jeep Wrangler TJ)

Item J101052
Market Price $498.99 You Save 12% ($59.04)
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$439.95 (kit)

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      Review & Installation Video

      The Flowmaster Force II Cat-Back exhaust system is for those of you that have a '97 to '99 TJ and are looking for a lower and louder exhaust note from your Wrangler. It's either gonna work with either your 4.0 or your 2.5-liter engine and it is going to replace, as it says, everything from the catalytic converter back, including the muffler and the tailpipe. This is a very simple one-out-of-three wrench installation. All you're gonna need are some traditional hand tools, about an hour's time to get this installed, very, very simple. Now, anytime you let your engine breathe better in or out, you can expect a little bit of horsepower and torque gains, but that's not the main reason to install cat-back system like this. Like I said, this is really gonna give you that sound and that volume that you're after from an aftermarket exhaust. That, coupled with the fact that even your newest '99 TJ may have some rust, may have a rusted-out exhaust system, this is going to make a really nice replacement without just going factory, getting a little bit of an upgrade to a better sound and also a higher quality material. Because this is a stainless material, because this is 409 stainless, this is going to be, you know, a little bit more expensive than an aluminized system would be. However, this isn't going to be as much as 304 stainless and it's not going to be as much as that top of the top premium system on the market. So, you have a nice balance of both quality and cost. While this does replace everything from the catalytic converter back, you're not going to get something that's ultrashort like a rock crawler style system. You're not getting a dumper for the axle. This is going to be a factory-style tubed system. However, the additional volume and sit...and lower exhaust note that you're getting is going to be coming from this muffler here, which is going to be a little bit different in the way it's baffled than your factory system would have been. All in all, this is a well-built system. As I said before, 409 stainless, not quite as high a quality as 304, you're still gonna get a little bit of surface rust on this system, but it's not going to rust out nearly as easily as an aluminized system would. This is a very simple one-out-of-three wrench installation. All you're gonna need are some traditional hand tools, about an hour's time to get this installed, very, very simple. The only thing that will make this difficult for you is rust. If you've worked on exhaust systems before, you know, they like to get rusty. And if you still have the factory system on your '97 to '99, chances are there's a good bit of rust on there, and that might slow things down a bit. So, spray all of your clamps, hangers, nuts and bolts, everything with good penetrating oil well before you get started ,and it will make it easier to get everything disassembled. Now, the first step is going to be removing the tailpipe from your muffler, and then your muffler from your catalytic converter, getting your whole old system out of the way. Now, if you have the factory-height TJ, it is going to be a little bit difficult to fish this over actual pipe out from between the gas tank, the axle, the bottom of the tub. You may have to finagle things a little bit. If you're not going to be reusing that old system, don't be afraid to take a hacksaw or Sawzall, just cut it, break here right at the top of that loop, make it a lot easier to get everything out of the way. If you have a lift, it'll probably be a little bit easier anyway. Now, if you have a lift kit on your TJ, or even if you don't to make it a little bit easier to fish your new system into place, you can jack up the Jeep by the bumper or by the frame, letting the axle sag a little bit, giving you a little bit more clearance to push everything into place. Now, with the installation of the new system, you're going to start by hanging your new muffler onto the catalytic converter, pushing the tailpipe into place, your axle pipe and tailpipe all as one here into place and attaching it to the other side of the muffler, using the included clamps to get everything taken down, this is going to attach to your factory exhaust hangers, making the install very, very simple. This cat-back's gonna run you $450, and that is pretty much the middle of the road for a stainless system. 304 stainless is going to be more expensive, aluminized is just going to be a little bit less. With a Flowmaster exhaust system, you're getting something that, you know, a lot of R&D went into. You're getting something that is a well-built system that's made of some pretty high-quality materials. And when you look at the rest of the category, if you want a high-quality cat-back, this is just what these cost. If you want a premium system, you have a higher budget, those are out there as well. And you can get a bargain system that's going to be made out at low-grade materials, but you're not going to get the same quality or the same sound. So, if you're looking for some more sound and a high-quality cat-back, I definitely recommend taking a look at this Flowmaster Force II Cat-Back for your TJ, that you can find right here at

      Product Information

      Features, Description, Reviews, Specs & Installation


      • Boosts the Horsepower and Fuel Efficiency
      • Stainless Steel Construction
      • Patented Delta Flow Technology
      • Single Rear Exit Design
      • Designed for 97-99 Jeep Wrangler TJ Models


      Features. Increase the horsepower and fuel efficiency of your jeep with the Flowmaster Force II Cat-Back System while providing a deep off-road rumble sound. Perfect for daily drivers, this catback exhaust system offers better throttle response. It is Dyno tuned to ensure great performance.

      Construction. This catback exhaust system is machined from durable stainless steel and features a single rear exist design and a muffler. It integrates the patented Delta Flow technology and includes a lifetime limited warranty.

      Application. This single rear exit catback system is designed for 97-99 Jeep Wrangler TJ models. It comes with all necessary hardware for installation.

      Fitment: 1997 1998 1999 Details

      MPN# 817493

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (3)

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      Ratings Summary

      5 out of 5 overall rating from 3 customers

      Installation Time: Afternoon

      • January 13, 2020

        5 1999 Wrangler - RingoG Installation Time: Less than 1 Hour


        Perfect. I tried the Magnaflow Pro first because the stock pipe was rubbing on the shock tube with my long arm suspension. The magnaflow has no resonator and is ridiculously loud. Cant talk in the cab loud. This Flowmasteris perfect. Quiet in the cab but has a nice grumble on decel. Now the wind noise in the cab is louder than this exhaust in the cab. Still has good tone. Flowmaster does a great job on their website explaining their lineup of exhaust. I had a much better idea what to expect over my Magnafliw experience. My only ‘complaint’ is it would have been nice to have a hint to put the rubber insulators on the Hanger arms on the exhaust first before putting on the hangers on the jeep. This would have made install easier. Other than that the fit is great. Hardest part of install is removing the old.

        Helpful (1)
      • October 06, 2018

        5 1998 Wrangler - mfroberson Installation Time: Afternoon

        Love the new sounds my 'ol TJ makes

        I bought the flowmaster cat converter with this and it all fit perfectly. I had to use a sawzall to cut out the old exhaust and put in all new parts. Watch for the fitment around the rear drivetrain to not have anything rattle like crazy. Love the deeper exhaust sound!

        Helpful (11)
      • August 26, 2014

        5 1998 - cjseven Installation Time: Afternoon


        My exhaust system bolted right on...hung on the original hangers and installed in 2 jeep sounds great.. Runs better and I get better gas mileage... Definitely a great product... Best of all was I had my exhaust system the next day shipped free from the fine folks at extreme terrain... Thanks for a quality product and keep up the good work...

        Helpful (18)

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      • TJ Wrangler 2 Door - 97, 98, 99

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