Flowmaster American Thunder Exhaust Systems add a signature growl that's best described as the "Flowmaster Sound" - A muscular, throaty rumble that announces your engine's presence. Flowmaster is the true tone of classic American muscle and performance.
For the Mustang owner looking for a complete cat-back dual exhaust system with an aggressive tone. With easy fit in mind, these American Thunder systems from Flowmaster are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the Mustang enthusiast who wants their performance to be heard. Like all Flowmaster systems, the American Thunder benefits include improved throttle response, power and mileage. Designed for an easy fit, these Mustang exhaust systems include all necessary parts and hardware for easy installation.
Since Flowmaster mufflers use sound energy cancellation technology, you don't have to worry about "packing material" deteriorating and getting louder after as little as a few months. The interior case volume of the inside of a Flowmaster muffler is far superior to that of a "straight-pipe" or "straight-through" muffler design. Imagine filling a "straight-pipe" or "straight-through" muffler with water vs. filling a Flowmaster muffler with water. Which one do think would hold substantially more volume? The deflector in a Flowmaster muffler acts as a one way check valve eliminating reversion back to the engine and creates a low pressure area to help scavenge the exhaust. Flowmasters unique style of H-Chamber designs help control interior resonance inside the cab area of your Mustang. "Straight-through" muffler designs cannot. Flowmasters use fully welded construction for added strength and durability to last even when installed on high horsepower engines.
Flowmaster mufflers are proudly made in the U.S.A.
- Fits 1986-93 5.0L Mustang LX & 1986 Mustang GT, will fit 93 Cobra by lengthening the rear tailpipe hangers
- 2.5" Inlet / 2.5" Outlet
- Supper 44 Series Mufflers
- 409 Stainless Steel Construction
- Mandrel Bent 16 gauge Tubing
Video: Fox Body Mustang Exhaust Kits: Flowmaster Cat Back & SVE Off Road H Pipe
Published on 2013-11-07
Give your Mustang an aggressive exhaust tone with the one of our SVE exhaust kits. This kits include our extremely popular SVE off road h pipe and your choice of Flowmaster cat back system. We have these kits available for LX, GT and Cobra models. If you want to go with a slightly more extreme exhaust setup, be sure to check out the SVE Dumped Exhaust kit that features the Flowmaster Cat Back kit with turn down or "Dumps". This kit is great of Mustangs with extreme performance based rear suspension kits that need more clearance by deleting tailpipes.
Don't need the full kit??? All part in this kit are also available individually on our website. LatemodelRetsoration.com is your #1 source of Mustang exhaust kits and components. Let us help you get the exhaust you have been dreaming about -- best of all we offer free shipping and great prices!
Each exhaust kit features the Flowmaster American Thunder Cat-Back Exhaust System. Flowmaster's catback systems feature mandrel bent exhaust piping to maximize performance and exhaust flow. They provide an aggressive exhaust tone without causing deafening interior drone and tone. They feature the popular Flowmaster Super 44 Mufflers and full aluminized steel construction.
This kit fits 87-93 GT models. The GT kit features exhaust tailpipe turndowns at the rear bumper cover just like the factory exhaust. It doesn't not feature polished exhaust tips as they are not visible from the exterior.
This kit fits 86-93 Mustangs with 5.0L V8. It is designed for those who need the extra clearance around the rear end. The exhaust turns down or dumps directly after the mufflers. This gives a ultra-aggressive exhaust tone and causes increased interior exhaust noise. Be sure to check with your local inspection company to see if this exhaust is legal for use on the road.
Here's another problem solving money saving kit from SVE.
We took our popular fox body mid-pipe and paired it up with a quality flowmaster cat-back to give you a great sounding exhaust system that's not going to break the bank. The reason you want to replace all your exhaust components, well, let's face it. What's under your car right now is probably completely rusted out. These components are direct replacements for the originals and will bolt right up to factory exhaust headers on '86 to '93 Mustangs as well as any aftermarket shorty header.
We're going to walk you through the installation from front to back and then give you some sound clips on this Convertible GT.
Thoroughly soak down off fasteners with penetrating oil and let sit. Remove the cat-back to mid-pipe nuts. Remove the existing cat-back from the car. The tail pipes may need to be cut to get them out. Check out all the rust coming out of our old cat-back.
Unplug and remove the O2 sensors.
Remove the mid-pipe to header retaining nuts. Loosen the smog tube to mid-pipe clamp. Pry the mid-pipe out of the hangar and the small tube and removed from the vehicle.
Take this opportunity do inspect all hardware and chase the threads as needed. Start installing as the SV H-pipe by hanging the two starter pipes in the hangar and loosely start the nuts on the headers. Use the supplied hardware to loosely attached the H section to the starter tubes. Inspect all your rubber exhaust hangers and replace as needed. You can grab brand new ones off our website.
Slide the tail pipes over the axle and hook the rear hangers into the insulators. Slide the supplied clamp on to the muffler outlet and slide the muffler outlet over the tailpipe. Hook the muffler hanger into the insulator. And use the hardware supplied with the H pipe to attach the cat-back to mid-pipe.
Use a jack to move the exhaust up into position and tighten the H section to the starter tube and then mid-pipe to cat-back bolts. Tighten the mid-pipe to header nuts.
Reinstall the O2 sensors. Plug them back in.
Completely inspect the tailpipe for clearance around the gas tank, frame rail, upper control arm, and front of the axle housing. Adjust as needed and tighten down the muffler to tailpipe clamp. Repeat for the other side.
Finally, it may be necessary to adjust the position of the smog tube attachment to connect the smog tube. Tighten down the smog tube clamp.
Replace that busted broke down exhaust system on your fox body with a brand new SV exhaust kit. We have them in versions to LX and GT, from '86 all the way to '93. Plus, they're great for doing true dual exhaust conversions on '79 to '85 Mustangs. You can even make them 49 state legal by picking up a set of our high flow mini catalytic converters. Take a trip over to your exhaust shop and have them welding in for you.
If you're not viewing this video on our website, be sure to click below to check out the full lineup of exhaust products for your fox body at latemodelrestoration.com.
Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!
this system has the iconic mustang sound and the stainless tailpipes look outstanding.
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Awesome sound, and fit
Jason Guhman on
I was working on my 7 up when I noticed the stock exhaust was rotted out! Well that was the excuse I needed to purchas the flowmasters ! They came to the door in perfect shape and in record time. The installation was a breeze and in no time I was taking the car off the jacks. The sound is great! It's that traditional 5.0 sound that you expect from flowmasters! Thanks to latemodelrestoration for great products, super fast shipping, and awesome customer support!
Flowmaster - The Exhaust Technology Company Flowmaster operates the only exhaust Research & Design facilities of its kind in the world, centered around the SuperFlow SF-7100 engine dynamometer complete with E.C.A. (engine cycle analysis) equipment and also SuperFlow chassis dyno's.
Through use of these dyno's, Flowmaster's engineering staff can track the complete engine cycle in millionths of a second and can obtain exact technical data of each degree of cam rotation, from induction to the tip of the exhaust system, while also showing the power numbers that really matter, the power numbers "to the ground."
Flowmaster also utilizes Spectrum Analyzers to fine "tune" the sound of each of the eleven different series of mufflers that Flowmaster currently offers, both for peak performance and just the right sound levels and tones. Flowmaster's dedication to quality is what makes them the exhaust industry leader for Latemodel Mustangs and SVT Lightnings!
'89 LX 5.0, 2 owner car, all stock except for exhaust. Flowmaster offroad H pipe, Flowmaster American Thunder exhaust kit. All new weather stripping, quarter window repair kit and various other parts ...