About the Video
Fox Body Mustang Dynomax Ultra Flo SS Catback Install & Sound Clips (86-93 GT, LX)
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Published on 2016-01-12
Dynomax’s cat back exhaust kits feature 2.5” aluminized steel constructed piping, easy installation and the tried and true Dynomax Ultra Flo muffler. This particular muffler is manufactured from stainless steel for lifelong durability and is completely polished for a show-quality shine.
The Ultra Flo muffler features an unrestricted, straight-through design and Dynomax’s proven CRF or Continuous Roving Fiberglass technology to absorb unwanted interior resonance while maintaining a deep performance exhaust tone.
All needed hardware is in the box with the only exception being the flow-tube to mid-pipe hardware since these will be re-used. This Dynomax Ultra Flo SS cat back will be available for two different Fox Body applications. One being 1986-93 LX cars and the other for 1987-93 GT Mustangs. So which ever kit you’re looking for be sure you select the correct one for your car.
Mustang Fitment: 1986 (86), 1987 (87), 1988 (88), 1989 (89), 1991 (91), 1992 (92), 1993 (93) LX, GT
Transcript
Hey! What’s going on everyone? Landan here with Late Model Restoration. Today this video is going to cover my quick overview of Dynomax’s Ultra Flo SS catback exhaust kit fitting your 1986-93 LX and GT Mustangs.
Dynomax is an industry leader when it comes to providing Mustang enthusiasts with high quality exhaust components. From complete exhaust systems to mufflers, Dynomax has what you need to get your Mustang sounding the way it should.
Dynomax’s cat back exhaust kits feature 2.5” aluminized steel constructed piping, easy installation and the tried and true Dynomax Ultra Flo muffler. This particular muffler is manufactured from stainless steel for lifelong durability and is completely polished for a show-quality shine.
The Ultra Flo muffler features an unrestricted, straight-through design and Dynomax’s proven CRF or Continuous Roving Fiberglass technology to absorb unwanted interior resonance while maintaining a deep performance exhaust tone.
All needed hardware is in the box with the only exception being the flow-tube to mid-pipe hardware since these will be re-used. This Dynomax Ultra Flo SS cat back will be available for two different Fox Body applications. One being 1986-93 LX cars and the other for 1987-93 GT Mustangs. So which ever kit you’re looking for be sure you select the correct one for your car.
Alright guys, follow along as I walk you through the detailed steps on installing Dynomax’s Ultra Flo SS cat back onto this pristine 1987 Fox with only seventy thousand original miles.
To begin installation, place the car on a lift or use a jack and jack stands. With the car in the air spray a penetrating catalyst on the flow tube to mid-pipe hardware. Allow the catalyst time to dwell before loosening the hardware. Since our factory cat back had some rust holes in it, we decided to cut some corners and make the over-the-axle pipes easier to remove. We cut the pipe right behind the muffler with a Sawzall. To help with removal from the exhaust hanger, spray some WD-40 onto the hanger.
If you have one, use an exhaust hanger removal tool to pop the metal hanger through the rubber at the rear of the car. Do the same for the other side. If you don’t have a special tool, just some good-ol-fashioned elbow grease will do just fine. Now, remove both over-the-axle pipes from the car. Use a 9/16” inch socket paired with a wobble to remove the mid-pipe to flow tube hardware. Again, use the hanger removal tool if you have one to help pry the metal hanger out of the rubber. Remove the rest of the factory exhaust from the car.
With both mufflers on the ground, remove the metal hangers with a 10mm socket. Carefully position your new Dynomax over-the-axle pipes. The hangers at the rear of the car will face toward the gas tank. Slide the metal hangers through the rear rubber insulator. Installation may be easier with a small application of WD-40 again. Our new Dynomax mufflers had a plastic covering over the polished stainless. Be sure you remove this covering from both mufflers.
Hit the front rubber insulators with some WD-40 and slide the hangers through the rubber with the ends facing out. Slide one of the included clamps over the rear pipe and then position the muffler. Slide another clamp onto the flow tube and then install the flow tube into the muffler. Loosely install the flow tube to mid-pipe hardware. Position the other muffler and flow tube, and then loosely tighten the hardware. Help from a friend may be needed when aligning the mufflers and tips. Loosely tighten the flow tube to mid-pipe hardware.
Before tightening all of the clamps, ensure that there is plenty of clearance between the piping and chassis. Align the tips and mufflers and then tighten down the flow tube to muffler clamps. Tighten the flow tube to mid-pipe hardware and then the muffler to over-the-axle pipe clamp. Now, reinstall the 4 previously removed hanger bolts onto the rear of the muffler. These will be self-threading into the new Dynomax muffler so make sure the holes are aligned on the hanger and muffler. Double check everything, and you’re all finished.
Well guys, you were probably wandering why we were putting a cat back on a perfect, low mileage Fox Body. As you could see, the stock exhaust for the most part had started to fall apart. This Dynomax kit was the perfect upgrade since it retains a nice subtle exhaust note. With that being said, let’s have a listen to what it sounds like.
If you’re on the hunt for a nice, subtle sound out of your Fox than this Ultra Flo SS kit from Dynomax is a must have. It installs with relative ease and is something you can do in your own driveway. Make sure you get the car as high as you can on the jack stands and this one should take you around 2 hours to complete.
A quick tip for any of you that have trouble removing the over-the-axle-pipes; simply remove both of the lower shock hardware and allow the rear end to hang. This will give you adequate clearance to get the current exhaust out of the way.
On the flip side, if the exhaust you are removing is useless, have some fun and cut that old junk with a Sawzall. This is obviously the easiest method to remove an old cat back that is no longer desired.
If you guys want to see more of the best install videos for your Fox Body Mustang, than I invite you to subscribe to our YouTube channel if you haven’t already done so. Don’t forget to head back over to the site and pick up a Dynomax Ultra Flo SS cat back for 86-93 LX or GT Fox Body at LMR.com!