2013-14 Ford Mustang Boss 302 Rear Diffuser - S197 by Ford

Bought this piece a couple weeks ago got it painted and installed I love it, I wouldn't change it for nothing.

This simple diffuser cleans up and enhances the rear bumper.

Finally got around to installing the rear valance and man oh man was it worth it. The install itself is pretty easy as long as you take your time and cut slow. As long as you have some mechanical skills removing the bumper and trimming it shouldn't be too difficult. The package was packed well, shipped fast, and looks amazing once installed. Definitely a must have for any owner of 2013 and 2014 Mustangs.

When customizing I like to keep things simple and make it difficult for anyone to just point out what you did. I want my car to look awesome but look like it should have come from the factory that way. This is a suttle change but it keeps your rear from looking like everyone else's without having to put a huge crazy over the top spoiler on it.

purchased a few weeks ago, and waited like a 12 year old kid because I couldn't wait to slap it on my bumper. Over all, product is excellent. I couldn't trust myself to cut my own bumper so I had it professionally installed. I'm happy with the new aggressive rear end..

I chose to remove the rear bumper. Factory Cut lines are on the backside, nice fit, hardware included where needed. Approximate 1 1/2 install time. Nice improvement.

really happy how it came out.. perfect fitment

I ordered this rear diffuser over the Roush valence as I'm not a fan of the squared exhaust look. The instructions that come with this diffuser are not great, especially if you have never messed with the rear bumper or anything before. There are some step by step videos on Youtube that are really nice and will lead you through it. By far the most difficult part is cutting the rear bumper to fit the diffuser. Although there are lines on the inside part of the bumper showing you were to cut, it is still a little scary. Take your time with this for sure. I used a Dremel tool with a plastic cutter instead of a body saw and it worked great. The only other headache with the install was getting the screws out of the rear mud guard. If you don't have a very shallow Phillips head screwdriver or ratchet, you'll have to take the rear wheels off.

I have had one mod on the top of my list since I got my car. The Boss 302 rear diffuser. I was debating on doing it because it involved cutting into the bumper of my new Mustang. But I decided that I would take my chances. I had to remove the bumper cover of the Mustang for the installation. Removing the bumper also required me to take off the inner trunk panel, mud flaps and tail lights. Once removed I had to cut the bottom of the bumper off as well as cut slots for the tabs of the diffuser to insert in to. After the cutting was done I attached the diffuser to the bumper cover and put everything back together again. In the end it was all worth it because I love how it looks. It adds a bit of aggression to the back of the mustang as well as help it stand out from the crowd. I could not be happier with the quality and fit of this item.

I purchased this piece to complete my rear end. It really adds an aggressive look to the back of the car. Installation was a tad bit difficult. It required the removal of the rear bumper and tail lights. Cutting the bumper was a relatively easy task with right tools. Ford actually has a guide on the inside part of the rear bumper on where to cut exactly, this would helped me tremendously if i had known earlier. Once the cutting part is done. Align the Boss Valence with the rear bumper and mark accordingly for the new tabs. Cut the parts out, install the diffuser and make any adjustments if needed. Finished product looks amazing!

I personally love the way that this valence makes your S197's backend look, it completes the look of it(if you have previously put other mods). On mine it looks especially good with my roush axle backs. Now the install is kind of a pain. Drilling and cutting your bumper takes time, especially to get the slots and size of the bumper to fit the valence's needs. Still, I highly recommend this product to anyone looking for a more aggressive rear end. And as far as late model restoration goes, the product got to my house the day after I ordered it and it came in great shape.

I have done a lot of exterior upgrades and all that was left was rear facia . This Diffuser makes all the difference in the look of rear facia. It was really easy to install and only took about an hour. I didn't remove the rear bumper cover although the instructions say to. I drilled very small pilot holes and then traced on the outside of bumper cover where to cut the bumper. It made the install simple and quick. I'm very satisfied and get lots of compliments. LMR got it to me quickly and as always the best price.

Bought the diffuser last Tuesday night and it arrived Thursday night. Super fast shipping! I was scared to death to remove the bumper cover but after watching a few YouTube videos I worked up some courage. Only took about an hour. Cutting the slot holes on the outer edges took the longest. If you can get a dremmel tool it works great for the main cutting. Long story short this thing changed the rear end of the car more than I could have dreamed. I'm in love! Thank you late model!!!!

This makes the car look so much better. Aggresive but looks like stock. You will need to remove the rear bumper on the car to do the installation. Once you remove the bumper you will notice that the factory bumper has the exact lines and tabs that need to be cut. Follow the lines on what to cut and cut the marked tabs and the installation will go smooth. The necessary hardware is included .
Great look !!!!!! Definetly recommend the boss 302 rear duffuser !!!!

I ordered this diffuser and had it in 3 days thanks to LMR. The product was perfect and without any defect. This install was a PITA. I feel an air saw is probably the best tool to use for cutting through your bumper. I made the cuts to mine using a dremel and ended up having to cut the excess bumper away in sections, adding to the install time. Still I managed to get it on in an evening and it makes the back of the car look a lot beefier.

When I bought my Mustang the Boss 302 diffuser was one of the "must do" mods, and it was well worth the money. The rear of the '13-'14 models is fantasic but the diffuser just adds another level to it. The install can be done with the bumper on, but the pre-marked areas to cut for the tabs are hard to see. If you are good with bodywork and patient it can be done in a few hours. Just take your time and only cut as much as you need.

I was a little aprehensive with this piece as it requires trimming of the bumper fascia. However, removal of the bumper is not that difficult. As mentioned by others, the bumper has the guide lines that show where to cut. It is required to trim the bumper otherwise the diffuser wont fit properly. Once installed the result is nothing short of dramatic. Highly recommended!

I've been working on modifying the rear end and this piece compliments the effort. A lite intimidating at first but worth it. Removing the bumper cover, makes this easier tondo. The lines are already there to follow and cut. Just be sure you lay some blankets down or get horses to keep your painted bumper cover from getting scratched from the ground.

Purchased this rear diffuser about 6 months ago. Just this little bit of plastic changes the way the rear-end looks! I had Ford do the installation and finished it within a few hours. I'd recommend this product to anyone looking for a nice and complete rear-end.

I bought this diffuser and I paired it with the RTR decklid and got that custom painted that. Now the rear end of my car looks very aggressive and original. The diffuser breaks up all the white in the rear and I love it. Fitment and ease of install A+

Nice part I love the way it looks on my white 2014. Install was not easy if you dont use the right tools you can mess up pretty quick. Be patient with this install.

Makes the rear look so aggressive. I paired mine with the gt 500 spoiler and it looks so good.

Really finished off my rear end look

Without having the install instructions loaded on the page, I was unaware that installing this diffuser would require a bit of cutting. It sounds awful at first, cutting apart your perfectly fine stock bumper for the sake of modification, but was not that bad. Ford was kind enough to provide lines on the back-side of the bumper to show you how to do it and if you watch the Latemodel Restoration Shelby diffuser video, the install is roughly the same. Just be sure not to cut away too much material.
Fit and finish is great and it adds a subtle difference from your to all the other 13-14 GTs. Looks great with my Roush mufflers and 4 inch tips crowding the holes in the back for the exhaust.

First mod on the car, and it was definitely worth it. Adds a little something to the rear end without breaking the bank. As far as installation goes, removing the bumper makes it so much easier, and cutting is a breeze because of the lines on the inside showing you where to cut. If you're still unsure of yourself, there are plenty of tutorials on youtube and forums. Take your time cutting with a dremel, and you'll be fine. All in all, super happy with the purchase and customer service.

I bought this diffuser and installed it last weekend along with a gt500 wing. I absolutely love it. It makes the car really stand out and the fitment was perfect. I remover the rear bumper to do the little bit of cutting required but after doing it I'm positive it can be done with the bumper still on the car. I highly recommend this diffuser it just makes the car look so much better.I'll drop the only photo I took below bit it doesn't do it any justice at all.

All the spots that need to be cut are already marked on the bumper cover by Ford so don't be scared. Even if you are off a little EVERYTHING is covered by the new diffuser and nobody will ever notice. I had the Roush rear with square tips and it was too loud so I bought this with some RTR axle backs and like it much better.

This is a must buy for anyone wanting to upgrade the look of the rear of their 13-14 Mustang, it will completely transform the look of the car. The install itself is easy however it is time consuming. It's not overly difficult since the stock bumper has lines in it where you need to cut, no template needed.

First time body work was really easy. Took off the bumper cover after watching YouTube, made the necessary cuts, snapped in the part and was done. Anyone can do this as long as you have a drill and a sawzall. A must to complete your Mustangs rear!

This product was shipped fast and was packaged really well. The instructions are pretty easy to follow and the install wasn't too bad at all. Great product that completely changes the look on 13-14 GT's for the better.

This Boss302 diffuser really changed the appearance on the rear end of my mustang. Installation was pretty straight forward. I am very pleased with the outcome. Thank you!

Nice part I love the way it looks on my white 2014. Install was not easy if you dont use the right tools you can mess up pretty quick. Be patient with this install.

This Boss Diffuser really makes the rear end of my Ingot Silver Stang really stand with the contrast of the colors. Fit is great and the install isn't bad either.

install is easier than it seems.looks amazing worth every penny.. Latemodel Restoration is amazing

Couldn't be happier with the way this turned out! One step closer to a 2013 Boss Clone!

Looks great!
Don't let the fear of cutting the bumper hold you back.
It took the shop less than an hour to put on for me.

Great fit and its very nice