(approx) 1 Hour
Simple installation for anyone.
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- How to Install X-Force Varex Axle-Back Exhaust on your Mustang
$764.10 (pair)FREE Shipping
The X-Force Varex axle-back is something that you should check out if you have a 2005 to 2010 GT Mustang and you want an axle-back that'll give you the ability to change the sound and loudness of your exhaust on the fly from inside of the car. That's going to be the biggest differentiator with the Varex. Not only that, but the Varex will also appeal to those owners out there who would like a top-quality system when it comes to materials, and someone that doesn't mind spending a little bit to get all of these things. The install for this is easy. It's a one out of three wrenches on the difficulty meter, since an axle-back for this gen simply bolts right up into the stock location. But I'll get more into that later. You might not have heard of X-Force before, but they're actually a very popular and established brand down in Australia for quite some time now, where they originated. The Varex is their patented system. It's been around for a few years, so I wouldn't say that this system is new to the game. Like I mentioned earlier, this is a tunable exhaust and I will say that a lot of companies have tried the tunable exhaust thing before, with varying levels of success. X-Force and Roush are the two companies that I think did a good job with this design. You have options with the exhaust tuning. You aren't just stuck with either open or close, and I'll explain more in a second. Getting into it a little bit further, like usual with an axle-back, the main player of this axle-back and the centerpiece is the patented Varex mufflers that feature a mechanism or a butterfly within the actual muffler itself that functions a lot like your traditional cutout would, and all this is controlled by the included remotes. Now, unlike those traditional cutouts that are generally fully open or fully shut with no options in between, the Varex gives you the option to customize your sound with a level of adjustment, essentially giving you five different mufflers in one, as Varex puts it. This is achieved by opening the butterfly valve in different increments, changing the tone slightly along the way. So what does all this mean when it comes to sound and overall volume? What you guys heard in the sound clips and I'll say it again, the difference in sound is noticeable. With the valve fully closed, the sound or volume is very similar to what you'd find with the factory mufflers still in place. Maybe just a little bit louder, but not by very much. With the valve fully opened, it's another story. The sound really comes to life, and it's a good sound at that. There's plenty of tone, no rasp to really speak of, and a decent amount of overall volume. With everything closed up, I'd give this system a one out of five on my one to five scale. With everything opened up, that number easily shoots up to a strong two out of five on the loudness scale. It's not the loudest setup, but it does have a nice deep tone with zero drone inside of the car while cruising. There's a number of reasons why having full control over your tone and volume might be appealing. The most obvious would be to have the ability or the option to be quiet when you want to be or when you need to be. Say you're entering or leaving a neighborhood or an apartment complex, for that matter, or driving by Johnny Law. Maybe you have your significant other in the car and they aren't a fan of a loud exhaust, or maybe you're just trying to play the role of a sleeper. Whatever the case may be, Varex will be able to help you out. Now that you know what to expect, let's talk about the build of the Varex, because again you're getting more than just adjustable sound here. For starters, you're getting a full 304-grade stainless steel throughout, which is the best material in my opinion when it comes to exhausts, especially when it comes to resisting corrosion. The Varex does bolt right up to the factory location, and then it steps up to a full three-inch, mandrel-bent tubing throughout. It has very nice welds and four-inch, brightly polished stainless steel tips. So the Varex Performance mufflers are chambered, and that's where the butterfly valve comes in. So I have this muffler flipped around, so you guys can see what's going on here. This is the valve and with the valve fully closed, the exhaust flow goes through more of a chambered section of the muffler, keeping things relatively mild, sound-wise. However, once opened, the exhaust takes the path of least resistance. Essentially, this acts as a straight-through muffler, which is going to increase both sound and performance. It's all incorporated by the key fob that X-Force is going to give you. Each fob has two buttons, one to open the valve and one to close it. Again, you can play around with the sound by experimenting with the fob and the buttons. The butterflies are powered by a 12-volt source. X-Force includes the plug-and-play harness to get you up and running. The harness is going to plug into both mufflers right here, using water-resistant plugs, and from there it's fished inside of the car, through the trunk, to be plugged into the 12-volt power socket inside of the center console. This is a total plug and play deal here, guys. When it comes to price, as you probably expected, this isn't what I consider a cheap system. You can expect to spend a little over the $750 mark for this axle-back. You have to keep in mind what you're getting here, the adjustable tone, the full 304-grade stainless steel, and this is pretty solid for the price. In case you were wondering, X-Force does back the Varex with a one-year warranty on the electronics and butterfly, and a five-year warranty on the mufflers themselves. The install is pretty standard in the world of axle-backs, with a few exceptions. You're looking at a one out of three wrenches on the difficulty meter. You can plan on spending an hour of your time. You need a basic socket set and having a helping hand can help you out here. A lift would certainly make things easier for you here, but the job can be done on jack stands as well, if you don't have access to one. This axle-back very simple bolts right up into the stock location, so you won't have to cut or modify anything. You're just looking at dropping your old axle-back and the new axle-back will come with new clamps for you, so you don't have to worry about that. When you go to install your new setup, it'll probably be easiest to leave everything loose until you have it all lined up, and then tighten it down. When it comes to the wiring, again, everything is completely plug and play. With the harness connected to the mufflers, you run it up into the trunk, through the removable grommet in the spare tire area, and then from there you need to get it to the center console area to be plugged into the 12-volt socket. This might take you a little bit of time to do, as you'll probably want to hide the wire as well as you can under the carpet for a clean install. That's going to be it for this review of the X-Force Varex, but you can always check it out more online right here at americanmuscle.com.
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Fitment: 2005 2006 2007 2008 2009 2010
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September 13, 2019
Great idea, horrible execution
So just put these on 3 days ago and while I have to admit the idea is amazing and it does quiet down my car a lot (cams, off road H) it barely gets louder when the valves are opened. When the valves are closed there is a side hole that redirects air into the muffler and put past the valve. But for some reason the middle section of the muffler where air travels through when the valve is open also has baffling and makes the exhaust quiet even when open. So it goes from quieter than stock to slightly louder than stock. Great idea, terrible execution I have no idea why they would add baffling to the straight pipe part. Should not cost $750 when it falls flat on its face from what it should have been.Helpful (0)
March 12, 2019
Sound is awesome but it took a lot of time to center tips to bumper, they need to recheck their jig for brackets they weld on but once on everything worked greatHelpful (0)
February 25, 2019
They are a direct bolt on and look and sound great.Helpful (1)
February 12, 2019
After owning this product for some time now, I can say that it works perfect for me especially because I live in California and loud cars are being constantly pulled over, but with this product I can quite my car down trumendesly. Even though I used to be straight piped.Helpful (1)
September 26, 2018
Needed a pro to install
Required welding of new clamps, cutting, and fitting as the mufflers were slightly bigger than originals.Helpful (2)
February 15, 2018
from stock to outlaws to x-force
i went from stock to flowmaster outlaws. The outlaws are amazing and incredibly loud and fit perfect. the downside was the drone! At 2k rpms, I thought my ears were gonna bleed. I'm well out of my thirties and my drive time on the hwy is 30 minutes. The outlaws were not the product for me. I took a chance on this relatively expensive set and wow what a diff. these are exactly what i want! The fitment was poor and my son who is a mechanic had to do some cutting so it would not have been a diy garage job. Took him an hour on a lift in a pro garage. Fitment aside, these are perfect for my aging ears. Perfectly quiet when closed with a mild rumble when i gun it. When opened they are significantly louder (although nowhere near the outlaws) and have an even more aggressive sound. there is a drone when opened but you can barley hear it. In fact, its so slight you need to turn off the radio, stay at 2k rpms and listen for it. When closed, NO drone at all. Love this product and love playing with the fob! If you have grandkids, and own a "midlife crisis" mustang like me, get this exhaust.Helpful (3)
January 19, 2018
Xforce 07 GT
Let's face it, when modifying your exhaust it all comes down to sound and I wanted control from one extreme to the other. Price should also equate to quality. Happy to report I got both with the Xforce system. Sound open position; just a noticeable change in the cabin, outside the car a completely different story, awesome loud V8 muscle (headers,H pipe,Xforce). Sound close position; not much louder then stock set up. This modification was worth every penny and delivered exactly what I was looking for. I hard wired with a rocker switch inside the cabin but can also utilize the fob when demonstrating this system to friends. Easy install but as with any exhaust mods, takes a little time to get the exhaust tips adjusted absolutely perfect. Xforce exceeded my expectation on fit, quality and performance! Thanks American Muscle!Helpful (3)
December 18, 2016
X-force for 2005 mustang gt
Very nice polished stainless finish. Well built. All welds are perfect. Mufflers are an easy install. Nice tone in quiet mode and loud rumble in bypass. Only issue was that the clamps for inlets weren't good enough to clamp securely. These were replaced by american muscle at no cost.Helpful (5)
November 09, 2016
Goes from quiet to quieter
With stock cats this will make your car go from quieter than stock when closed to back to stock when opened. So I decided to get an off-road H-pipe. Now it will make your car go from quiet as stock to maybe just a tab bit louder than stock. With the ability to control the volume they should of designed it to be louder when opened. Also for $800 mufflers they sure take some effort to fit right. Was able to get passenger side centered but the ota still bangs on the chassis brace time to time. The driver side side a bit towards the left and the pipe hits the brace all the time.Helpful (6)
November 09, 2016
They look great and work very nice. Wish there was a button to install on dash, easier access while in the car. Wish wide open was a bit louder but overall great product.Helpful (3)
If I have a the true dual pypes v6 conversion kit, would this exhaust fit that?
If you have the True Dual Pypes V6 conversion kit, this axle-back exhaust system would work for your vehicle.
Good day I have got a Shelby GT500 m.y. 2007, I think this "back exhaust" can also be installed on my car, Is it correct? Many thanks for your reply Best regards Marco (from Italy)
his Varex Axle-Back Exhaust is designed as a direct fit bolt-on upgrade for the 2005 to 2010 GT Mustangs equipped with the SOHC 4.6L Modular V8 engine. This exhaust will NOT fit the 2007 GT500 Mustang.
I currently have a Borla cat-back Stinger exhaust. With the addition of new cams this year, the Stingers are just too loud. Will these bolt up to the Borla pipes on a 2005 GT?
You can use this exhaust with the Borla cat-back. However, you may have to do some modifications with the exhaust due to the different brands.
I currently have a Borla cat-back Stinger exhaust. With the addition of new cams this year, the Stingers are just too loud. Will these bolt up to the Borla pipes?
As long as the Borla are the same size as the factory exhaust, this should bolt right up.
I am interested in this type of adjustable exhaust for my 2007 Roush Stage 3, but obviously this isn't a bolt-on exact fit. Does AM offer a version of this for Roush owners?
When it comes to the exhaust, if it is designed to fit a GT, it will also fit your Roush!
Unfortunately axle-back exhausts will not usually provide any performance gains. Only an increase in the overall exhaust note.
The exhaust will sound louder inside of the convertible since the soft top doesn't provide the same amount of sound dampening as the hard top, but the actual volume of the exhaust system will be the same whether its installed on a convertible or a fastback.
This Varex Axle-Back Exhaust is designed as a direct fit bolt-on upgrade for the 2005 to 2010 GT Mustangs equipped with the SOHC 4.6L Modular V8 engine. We have seen customers cut and modify these exhausts to fit their GT500's or V6 Mustangs but will require professional modification. Any modification or altercation to this system will void all warranty and ability to return.
The X-Force Varex Axle-Back Exhaust will not fit on an 05 V6. They only fit on 05-10 GTs
We do have a video for the X-Force Varex Axle-Back Exhaust I have provided a link below. Please feel free to call or chat in if you have any other questions. https://www.americanmuscle.com/varex-axleback-0510gt.html
These will not fit a 2008 GT500 as they are exclusively for 2005-2010 GT model Mustangs.
The X-Force Varex Axle-Back Exhaust is specifically designed for the GT's only, and to install this kit on a V6 would require the bumper to be cut, a dual exhaust, and custom modification to ensure fitment between the cat-back exhaust and this axle-back.
(approx) 1 Hour
Simple installation for anyone.
What's in the Box
|Piping Material:||Stainless Steel||Tip Material :||Polished Stainless Steel|
|Piping Size:||2.5"||Tip Size:||4"|
|Muffler Type:||Chambered||Fitment:||2005-2010 GT|