Talk to a Mustang Expert
Mon-Thu 8:30a-11p, Fri-Sun 8:30a-9p

Free Shipping on Everything. Seriously. Details

RTR Rear Diffuser with 3pc Splitter (10-12 All)

9 Reviews
Our Price


  • Item #11091
  • MPN# 1098-7006-01

  • Market Price $629.99
  • You Save 14% ($90.00)
In Stock Ships same business day. Choose options to add to cart
Free Shipping on Everything
Product Videos Customer Photos
  • RTR Signature Modern Aggressive Styling
  • Rear Diffuser with 3-Piece Splitter
  • Features Grained Texture
  • Injection Molded TPO Material
  • OEM Fit and Finish
  • Fits All 2010 to 2012 Mustangs
Ready To Rock! This is the same exact diffuser that is included as original equipment on the Ford Mustang RTR designed and developed by Vaughn Gittin Jr. The RTR diffuser features a modern aggressive race inspired 3-piece splitter assembly, making it the perfect addition to your modern muscle car.

Quality Construction. Manufactured from OEM quality high pressure injection molded high-strength thermal plastic olefin (TPO) for its long lasting durability, this rear diffuser features an OEM grained texture to increase longevity against rock impacts from daily driving.

Application. This RTR Rear Diffuser is a direct fit appearance upgrade for all 2010 to 2012 Mustangs, including the V6, GT, Boss and Shelby GT500 models.

Shipping Note: This product can not be shipped to an APO/FPO, Guam, Hawaii, Puerto Rico, Alaska, the US Virgin Islands or Canada addresses.

Fitment: 2010 2011 2012 Details

What's in the Box
Hardware included:
  • Lower rear diffuser
  • 3 piece splitters
  • Pushpins
Installation Info
Will it fit my Mustang?
  • Boss 302 - 12
  • V6 - 10, 11, 12
  • GT - 10, 11, 12
  • GT500 - 10, 11, 12

V6 Mustangs require a dual catback exhaust system

Most Helpful Reviews


This was a great addition and product to add to any newer mustang. I have also combined this valance with the front RTR splitter and the combo looks great. Install was a breeze; all the instructions were ...

Read More
Helpful (5)

I'm Ready to Rock!

You will be as well with this RTR rear Diffuser. Mine was a little more complicated to install due to the rear reversing sensors but it still wasn't to bad to install. CDC did a great job designing this ...

Read More
Helpful (4)

Overall Rating 4.8 out of 5 stars
Read All 9 Reviews

Review & Install Video

Hey I’m Justin with, and I’m checking out the RTR Rear Diffuser with 3 piece splitter fitting all 2010-2012 Mustang GTs. As fans of Vaughn Gittin Jr’s Ready to Rock drift and street Mustang, AmericanMuscle is excited to bring you these appearance parts from the RTR package, this time featuring the same exact rear diffuser and splitter combo used on the RTR special edition Mustangs. There are two major parts that make up this package, the first is the rear lower diffuser. The diffuser wraps around the entire lower portion of the rear bumper, and fills the void in the middle of the factory rear bumper very well. The diffuser is then capped off with the 3 piece splitter, which looks awesome and definitely adds a bit more muscle to the rear of the car. Both the diffuser and splitter are made from OEM quality injection molded thermal plastic, and feature this OE style grain like texture, which is going to make it blend seamlessly with other factory parts on the car. Accorded to the detailed instructions included with the rear diffuser, You will need to remove your rear bumper and tail lights in order to properly install the RTR piece. While it’s nothing more than a few screws and some factory push pins, it can be a little time consuming so we’re going to call this one 3 hours from start to finish, just to be on the safe side. It’s no secret that Vaughn Gittin Jr. and Ford were really trying to nail the look of a legit race car with the RTR package, and with parts like this diffuser, available right here at, they’ve done a great job making the already tough looking Mustang look even better.

Customer Photos (11) Submit Your Photo

View All 11 Photos

You Might Also Like

5 Questions / 7 Answers

Ask a Question

Will this work with reverse sensors? I have noticed in the pictures that none of the installed diffusers have the reverse sensors installed. My stock diffuser has the sensors on them, and I was wondering how hard would it be to put the sensors onto the RTR diffuser?


  • I've seen some do it on theirs, obviously you need to make some holes for it... I know I would not be able to do this, but a specialized shop should be able to do it for you.


    Good Answer (3) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

Can I buy only the RTR piece splitter? Is it compatible with 2013 GT/CS rear bumper?


  • We only carry this as a set including the diffuser and the 3-piece splitter. Unfortunately, this will only fit the 2010-2012 Mustangs as the bumper changed slightly on the new 2013s.


    Good Answer (0) (0)

Show 1 more answer Question Resolved

Downforce Does this diffuser actually provide additional downforce, or streamline the air coming out from under the car to reduce drag/ turbulence?


  • more looks than preformance, does help but not much


    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

paintable? I would like to have this painted to match the car. But with the factory "texture" on the plastic is it possible to get a smooth surface when its painted, so it doesn't look cheap?


  • You can have it sanded down by a body shop then painted. I did this with mine and it's smooth.


    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

will this work with the ford rear splash guards?


  • The RTR Rear Diffuser with 3pc Splitter (10-12 All) will be able to work with the Ford rear splash guards.


    Good Answer (0) (0)

Question Resolved

More Products You Might Like

Customer Reviews (9) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

  • Fit 5 5
  • Appearance 5 5
  • Bang For Your Buck 4.75 4.8

  • 5/5

    Installation Time: Afternoon

    January 20, 2012


    This was a great addition and product to add to any newer mustang. I have also combined this valance with the front RTR splitter and the combo looks great. Install was a breeze; all the instructions were clearly written and had pictures as well. It only took about an hour an half from un-boxing to it being completed. I would highly recommend this rear valance to anyone looking to get away from that stock look. NOTE: with the v6 mustangs you will need to get two black barbed push pins from ford ($3.80), due to the v6 valance not coming with them from the factory.


    Year: 2011 Submodel: V6

    Helpful (5) (0)

  • 5/5

    Installation Time: Afternoon

    March 17, 2012

    I'm Ready to Rock!

    You will be as well with this RTR rear Diffuser. Mine was a little more complicated to install due to the rear reversing sensors but it still wasn't to bad to install. CDC did a great job designing this and the diffuser it's self is an OEM part so the fit is perfect. Really improves the look of the car and especially when you add the Roush rocker panel splitters. Ya it's a little pricey but if you want to stand out from the rest of the herd you need to spend a little. Great addition to the GT.


    Year: 2012 Submodel: GT Newfoundland, Canada

    Helpful (4) (0)

  • 5/5

    September 11, 2011

    Aggressive Look

    This piece gives the car an aggressive look. It matches well with my other splitters (roush side splitters, and boss front splitter). The install was fairly easy and took about 2 hours. It came with directions which helped. The hardest part was putting the diffuser and the bumper apart. There are tabs holding it together near the license plate. Other than that no problems. There are tabs near the taillights and the directions say you need a hook tool. I just lifted up on the whole bumper and pulled slightly and it came off. The splitter pieces feel smoother than the diffuser which took me by surprise I thought it would be rough like the actual diffuser and side splitters. Im curious if thats how it is on an actual RTR but either way im happy with the look and turnout.


    Year: 2011 Submodel: GT NJ

    Helpful (2) (0)

  • 4/5

    Installation Time: Shop Install

    August 27, 2015

    nice piece

    looks great, stylish, fits right. black finish looks factory or better


    Year: 2011 Submodel: GT SOUTHBURY, CT

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    February 22, 2013

    Ready To Rock!

    RTR rear diffuser is high quality, gives it an aggressive look and makes the rear of the car look about 1 1/2" lower than stock with the rear splitter. I have both the front RTR splitter and rocker panels making the whole bottom of the car line up. It also goes perfectly with the GT500 rear splash guards.It took about 2hours to disassemble and install and you will need a buddys help for this. Yes its pricey but worth the $$$ I would definitely recommend this item.


    Year: 2012 Submodel: GT Los Angeles, CA, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    November 08, 2012

    Rear end diffuser

    This made my 2012 mustang gt premium look better than the current gt 500 according to everyboby who sees my car


    Year: 2012 Submodel: GT Manila Phillipines

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    March 25, 2012

    It looks even better than i thought it would!!

    Hi everyone, if you want to give that agressive look to your mustang, the RTR rear valance is what you want!! You don't even have to be a rocket scientist to put it on and you don't have to remove the whole bumper either. There's 2 extra brackets attached to the valance so make sure you don't cut them off cause there's 2 holes already made under the car to fix it in place.You need 2 extra bolts, 1/4" X 1" with flats and nuts, not provided with the product. Go ahead, take some pride in your ride and enjoy!!


    Year: 2010 Submodel: GT St-Antoine-Sur-Richelieu, CANADA

    Helpful (1) (0)

  • 4/5

    Installation Time: Afternoon

    March 22, 2013

    Looks good!!

    Rtr did a great job making this diffuser fit perfectly. I had no problems getting it installed at all. And as always AM was great. Thanks guys


    Year: 2012 Submodel: V6 CA

    Helpful (0) (1)

  • 5/5

    Installation Time: Shop Install

    February 24, 2012

    RTR Rear Diffuser

    The RTR rear diffuser is the same as the CS/BOSS/GT500 but with the splitters added. Great fit, the splitters really make the difference on the finish, it matches perfectly the look when you have also the Boss front Splitter and the Roush side Splitters.


    Year: 2011 Submodel: GT California

    Helpful (1) (2)

Related Mustang Categories