Project High Impact: 2013 Mustang GT500 Rear Lower Valance & Axle Back Muffler Installation
If you’ve followed along, our 2013 Mustang GT code-named Project High Impact has been the host of several OE derived and Ford Racing modifications. The latest installment on its journey gives it the true markings of a supercar with our 2013 Mustang GT500 Rear Lower Valance and Axle Back Kit. When we started our GT was still wearing its stock rear appointments but we know it deserved something more fitting. We really liked the OE setup on the awesome 2013 GT500 and decided that is what we wanted for our project Mustang! Follow along as we make the transformation. The 2013 GT500 Rear Lower Valance and Muffler Kit will fit 2013 Mustang GT and Boss 302. ** With some modification this kit will fit the V6 model. Due to the differences in the piping diameter you will need to have a muffler shop weld or build you a custom flange to make this kit adapt to the V6′s smaller diameter piping. **
Start by removing the rear plastic panel inside the trunk. It is held in with a couple of plastic nuts and a pair of push pins. Once those are out-of-the-way, lift straight up on the panel to release the clips from the underside. Then you can disconnect the wiring harness and push the rubber sealing grommet through the trunk panel. If you’re like us and really don’t like working around things, go ahead and pull the rear tires off as well.
Move on to the bumper cover and remove the screws at the rear of the wheel well along with the four push pins underneath. With those out-of-the-way the bumper fascia simply pops off. Finish up by removing your axle-back mufflers.
Lay the bumper cover face down on something soft, like an old blanket. Remove the two red reflectors along with the black trim filler from the bumper. Take a moment to prepare yourself to cut on your new Mustang. Luckily, Ford saw fit to bless us with the exact cut lines needed to trim the GT bumper to fit the GT500 lower valance, calming the nerves significantly!
Grab you an air powered body saw and go to work. Follow along the provided line until the lower portion of the bumper cover is cut free.
Then grab you a drill with an 11/32 drill bit & drill holes at each end of the pre-marked tab slots.
After that, finish cutting out all the tab slots with the body saw.
Once you arrive at the fully cut stage, take & deep breath, pat yourself on the back for a job well done, and go ahead and snap the 2013 GT500 rear lower valance in to place.
Before re-installing the finished bumper, go ahead and install the 2013 GT500 axle-back mufflers. They reuse the stock hangers and are a direct fit to the car & the tailpipes.
Finally, hang the bumper cover back on the car. We noticed the rubber seal at the bottom of the tail lights may give us some trouble, so to make it easy we removed the tail lights before installing the bumper.
After the wheels went back on we pulled high Impact out to show her off & get some sound clips. The look is amazing & the sound is even better! For a minor investment of time & money you can transform the rear of your Mustang as well! Check out the finished product & the sound clips!
Comments
loce the double tips
love
Looks great! How’s the sound?
there a lil more raspy then singles
Sounds nice!
Can you make a lower panel like this for 2011+ Mustangs?
….jerrycecco@gmail.com
At this time there isn’t anyone currently making this diffuser/valance for the 2011-2012 Mustangs.
You guys need to quit tempting me….
makes me sad that I just installed a Boss 302 rear diffuser on mine in a more creative manner. Wish I had known those tabs were on the back side before i got all creative with mine
@latemodelresto: Where can I purchase the quad exhaust from? And how much? I’ve been looking for that setup ( quad ) for so long, ever since the photos of the concept 13 Shelby gt500.
This kit is available on our website. In the blog you will find the video with sound clips. The video is on the “looks and sound” tab. -Jeff http://www.latemodelrestoration.com/item/LRS-17828ABK/2013-Mustang-GT500-Style-Rear-Valance-Axle-Back-Kit
The BOSS diffuser is a good substitute for those that don’t like the quad tips look. I will probably go the BOSS route, but this is still sweet. First thought that crossed my mind as far as exterior mods went when I ordered my car.
If I just want the axle back quad tips do you sell that too or is it an entire package deal? Also I have a V6 and it says it’s for the GT/boss could I essentials bolt this up to mine if I found a place that will do it?
If I just want the axle back quad tips do you sell that too or is it an entire package deal? Also I have a V6 and it says it’s for the GT/boss could I essentials bolt this up to mine if I found a place that will do it?
Eric Reyner the 2013 GTs and V6s both have the same rear bumper so this will work on your V6. The quad tip axle back will not work the the factory V6, GT and Boss valances. These rear bumper valances are designed for single tips not dual tips on each side. It does require the GT500 valance for installation. Hope this helps. -Jeff
Eric Reyner the 2013 GTs and V6s both have the same rear bumper so this will work on your V6. The quad tip axle back will not work the the factory V6, GT and Boss valances. These rear bumper valances are designed for single tips not dual tips on each side. It does require the GT500 valance for installation. Hope this helps. -Jeff
Michael May check out the end of the video for a sound clip. -jeff http://youtu.be/sk0FQIWt5wM
For what it’s worth this is a Boss diffuser here on my car. Bought from LateModelResto, but I bought it before there was really any research into mounting options, and I ended up getting a little creative. This was a test fit before I found a solution for mounting around the exhaust tips.
https://sphotos-a.xx.fbcdn.net/hphotos-ash3/542509_10151207487482953_1384564438_n.jpg
For what it’s worth this is a Boss diffuser here on my car. Bought from LateModelResto, but I bought it before there was really any research into mounting options, and I ended up getting a little creative. This was a test fit before I found a solution for mounting around the exhaust tips.
https://sphotos-a.xx.fbcdn.net/hphotos-ash3/542509_10151207487482953_1384564438_n.jpg
For what it’s worth this is a Boss diffuser here on my car. Bought from LateModelResto, but I bought it before there was really any research into mounting options, and I ended up getting a little creative. This was a test fit before I found a solution for mounting around the exhaust tips.
https://sphotos-a.xx.fbcdn.net/hphotos-ash3/542509_10151207487482953_1384564438_n.jpg
For what it’s worth this is a Boss diffuser here on my car. Bought from LateModelResto, but I bought it before there was really any research into mounting options, and I ended up getting a little creative. This was a test fit before I found a solution for mounting around the exhaust tips.
https://sphotos-a.xx.fbcdn.net/hphotos-ash3/542509_10151207487482953_1384564438_n.jpg
For what it’s worth this is a Boss diffuser here on my car. Bought from LateModelResto, but I bought it before there was really any research into mounting options, and I ended up getting a little creative. This was a test fit before I found a solution for mounting around the exhaust tips.
https://sphotos-a.xx.fbcdn.net/hphotos-ash3/542509_10151207487482953_1384564438_n.jpg
I sooo want this. My 2013 is bone stock, only option was red candy paint.
I was there the day the exhaust was put on … It sounds awesome !
I was there the day the exhaust was put on … It sounds awesome !
I’ve been waiting for this to come out.
I just need the quad axle back kit (+ hangers ect) I plan on fabricating my own system xpipe, headers, ect how much just for the quad tips and everything to instal them? Lol. I don’t wanna spend almost a grand for stuff I’m not gonna use lol
Eric Reyner What year model is your Mustang?
Eric Reyner This kit reuses all factory hangers. If you get only the axle back you will have to cut up your GT rear diffuser since it is not designed for the quad tips. Let me find out if the axle back can be purchased separately. -Jeff
Could you guys please verify that the 2013 BOSS 302 rear diffuser will clip in to the now modified rear bumper instead of the gt500 diffuser?? (Without the gt500 axlebacks off course) it would be nice to know that we wont be stuck with the wide cutout at the bottom if we choose to change mufflers down the road. I would REALLY appreciate te effort to check. Thanks guys!
Dariusz, the boss rear diffuser will install in the same manner as the gt500, and allow you to keep your existing single-tip axle back-Scott
I meant after i already trimmed my bumper and fitted the gt500 diffuser with the quad tip axle back, can i remove them and put the boss diffuser to fill out the exhaust cutout again to run the single tip mufflers if changed my mind down the road?
Do they flow the same as the other axle back options?
Do they flow the same as other axle back options?
@mvela_5431 Flow rates we be different between all brands and style mufflers. What mufflers are you comparing these to?
(2) Screws(2) Screw Nuts(8) Retaining Clips can i buy just these parts?
@deathbud Sorry, Ford Racing kits like this are only available as the entire kit.
Do you sell the rear valance and hardware without the axle back?
Is that a NO?
@Pilks Currently we don’t sell those as separate pieces. Sorry for the delayed reply.. didn’t notice this comment come through!
@Pilks Currently we don’t sell those as separate pieces. Sorry for the delayed reply.. didn’t notice this comment come through!
The information above says that this kit will fit the V6 as well. I can understand how the valance will fit with some cutting and adjustment but what about the exhaust. What size tubing is used on the mufflers. I did not think these mufflers would fit the V6 because the V6 has 2.5 inch tubing.
To install on the the V6 you will need to do some modification. An exhaust shop should be able to weld or build a simple flange to make the stock v6 exhaust piping work with the GT500 axle back. Thanks for catching that. The product should reflect this now.
Are the sounds same? How ? V6 & GT engine is different. Isn’t Axle back exhaust same between V6 & GT ?
I can’t understand that the different engines have the same sound on same axle back exhaust.
If I want to purchase all shelby GT500 badges and the front bumper, From where and how much it will cost? As I’m planning to convert My GT to GT500 (front and End) of course with the side badges.