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Ford Performance GT500/CS/BOSS Rear Diffuser (10-12 All)

Market Price $192.99 You Save 12% ($23.00)

$169.99

FREE Shipping
  • Item 53675
  • MPN# AR3Z-17F828-AA

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Shelby GT500/Boss Styling
  • Genuine Ford Part
  • Features Grained Texture
  • OEM-Quality Plastic Material
  • OEM Fit and Finish
  • Fits 2010 to 2012 Mustangs
Shelby GT500 Styling. This Lower Rear Valance (a.k.a. Diffuser) is the exact same one that is featured on the Shelby GT500, California Special and Boss Mustangs. Offering aggressive race inspired styling this rear diffuser makes the perfect replacement part or appearance upgrade for your Mustang.

Quality Construction. Made from OEM quality high pressure injection molded thermal plastic for it's long lasting durability, this rear diffuser features an OEM grained texture to increase longevity against rock impacts from daily driving.

Application. This Rear Diffuser is a direct fit replacement for the 2010 to 2012 Shelby GT500, California Special and Boss Mustangs, and can be installed to upgrade the appearance of the V6 and GT 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
  • (1) Rear Diffuser
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

5/5
Looks awesome, easy install

This diffuser looks great and only took me about 2 hours by myself. That's with an added step also, since I had to remove my rear wheels (screwdrivers too long). I did it myself, didn't need a helper. ...

Read More
Helpful (1)

5/5
Yay

Looks great. I wanted exactly what I got makes the back look tons better

Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 73 Reviews

Customer Photos (79) Submit Your Photo

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11 Questions / 13 Answers

Ask a Question

color match Is this part the same color as the CS front clip and the rocker panels that come standard on 2012 Mustangs?

winner

  • Yes, these parts are unpainted with that charcoal rough texture feel to them like from the factory.

    Dons2011v6

    Good Answer (1) (0)

Show 2 more answers Question Resolved

rear parking aids...disable? Is it possible to completely eliminate the rear parking sensors mounted in/on the factory rear diffuser and not have to drill holes to mount them in the new GT 500 diffuser, or can I simply use the info center, select off and cut/or cap the end of the wires?

winner

  • The rear sensors are completely removable.

    BlackWolfNDN

    Good Answer (0) (0)

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

Does it fit right on a 2012 V6 base with Borla ATAK ABs? I see in the fitment section of the product page it says "V6 Mustangs require a dual catback exhaust system." What does it mean? Is it going to fit right on a 2012 V6 base with Borla ATAK ABs?

lannshine

  • The 2010 Mustangs still had a single exit exhaust. For this to fit properly, they would need to change over to dual exhaust. Your 2012 V6 came stock with dual exhaust and you won't have any issues using your Borla Axle-backs with this diffuser.

    LisaS

    Good Answer (1) (0)

Show 1 more answer Question Resolved

Can this part come painted? Would love to buy this if the upper half was body color

heuser1

  • Unfortunately, this is not one of the products we can paint before shipping.

    LisaS

    Good Answer (0) (0)

Show 2 more answers Question Resolved

Will this work with Pypes 4 inch tips axleback exhaust? I have the Pypes axleback muffler delete exhaust on my 2010 GT. They have a 4 inch tip, as opposed to the stock 3 inch tip

BabyBlueStang

  • Yes this should work. I have seen this valance with 5 inch tips on one of the forums. The only problem I could foresee is if the alignment of the tips is off and they make contact with this valance it could either create rubbing issues due to vibration or possible heat damage from the exhaust tips contacting the plastic.

    RobD

    Good Answer (1) (0)

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

Is this lower than the stock valance? I was looking to complete all 4 sides of my car. I already have ordered the CDC chin spoiler and Roush side splitters. Both those parts make the car appear lower while not actually reducing the ground clearance by much (if any). Is this rear valance lower than the stock OEM valance or is it the same height off the ground?

Sloop

  • It is almost exactly the same dimensions. I installed it on my '12 5.0 GT without any issues. The only issue is If you have rear sensors you will have to drill holes for their use on the GT500/Boss rear diffuser.

    winner

    Good Answer (0) (0)

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

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Customer Reviews (73) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

  • Fit 4.809524 4.8
  • Appearance 4.952381 5.0
  • Bang For Your Buck 4.730159 4.7



  • 5/5

    September 04, 2016

    Boss 302 rear diffuser backup sensors.

    It was real hard to make the decision to drill holes in the Boss 302 rear diffuser for the backup sensors. After very carefully cutting the holes for the sensors, the finish product was well worth the time.

    RedRocket

    Year: 2012 Submodel: GT

    Helpful (1) (0)

  • 4/5

    August 29, 2016

    Great product!!!

    Easy install took around 1 1/2. Shipping was also fast. Only thing I disappointed about was American muscle spelled my address wrong so the ups driver had to call me acouple times to figure out where I lived. Box was also in horrible shape barley closed. But thank god nothing was damaged. Other Than that instal was easy, part looks great and for the money it's worth it.

    Ricky

    Year: 2012 Submodel: V6

    Helpful (1) (0)

  • 5/5

    August 23, 2016

    Yay

    Looks great. I wanted exactly what I got makes the back look tons better

    Jaw

    Year: 2011 Submodel: GT

    Helpful (1) (0)

  • 5/5

    August 10, 2016

    Looks awesome, easy install

    This diffuser looks great and only took me about 2 hours by myself. That's with an added step also, since I had to remove my rear wheels (screwdrivers too long). I did it myself, didn't need a helper. Lining everything up was easy.

    D

    Year: 2012 Submodel: GT

    Helpful (1) (0)

  • 5/5

    July 11, 2011

    Rear-ly Awesome...

    The product itself is top notch but unfortunately there is no installation guide with this item. There is some guess work involved but the entire install is pretty easy but requires some specific tools - mainly push pin pliers! The item comes with these two tabs - AND THEY LOOK BROKEN BUT THEY ARE NOT. I went through some pain trying to figure this out. Install takes about 2 hours - maybe more. But some has been able to do in 1 hour. Overall it gives the mustang a more aggressive look from the back. Good job AM!

    Elm Valle

    Year: 2011 Submodel: V6

    Helpful (7) (0)

  • 5/5

    Installation Time: Afternoon

    August 24, 2011

    Great look and easy install!

    This only took me 2 hours to install! It didn't come with instructions so I used the ones for the Roush part. Very similar. I had to get a buddy help detach and reattach the assy to the car. Other than that, It's pretty easy. Truly worth the money!

    areedaf

    Year: 2010 Submodel: GT Brescia, Italia

    Helpful (4) (0)

  • 5/5

    August 22, 2011

    Much meaner looking

    Part arrived well packed from AM. Install took a little longer for me because my 2012 V6 MCA has the reverse sensors in the diffuser, so I needed to drill holes for the sensors in the GT500 diffuser (measured 10 times, cut once!). Fitment is perfect, looks like it came from the factory with this diffuser on it.

    Pete

    Year: 2012 Submodel: V6

    Helpful (3) (0)

  • 5/5

    Installation Time: Afternoon

    March 01, 2012

    nice part for the money highly recomended

    Everything arrived in perfect condition and realy fast I loved so You earned my bussines from now on planning on buying more stuff from you Thanks Jose

    Dontole56

    Year: 2012 Submodel: V6 Orlando FL.

    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    March 01, 2012

    Nice looking rear

    It took me about 1 1/2 hours to install. Much more aggressive look than the factory rear diffuser on the V6. Great bang for the buck. Very satisfied with my new rearend.

    Unclenard

    Year: 2012 Submodel: V6 FL

    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    November 09, 2015

    Rear Diffuser

    Part arrived as freight on an 18 wheeler. Must be because of the size dimensions, certainly not the weight. The driver finally made it out of the cul-de-sac...in reverse. The install took about 2.5 hours for me (interruptions from the wife). I would recommend you get a "Trim removal Kit" from your local auto store. It will save the clips and make the install much faster. This item should be standard on all dual exhaust Mustangs. It gives the car a more aggressive look from the back and completes that modern/retro combination for the S197 rear end. Thanks AM! Saving for the next item!!

    Jeb

    Year: 2010 Submodel: GT Brunswick, GA

    Helpful (1) (0)

  • 4/5

    Installation Time: Afternoon

    January 31, 2012

    looks awesome

    The rear diffuser took me about an hour and 45 mins to install and it looks great! it popped right into place after removing the stock part. Its a great look for any mustang and would suggest it if you want your mustang to look better then it already does.

    Jackattck777

    Year: 2011 Submodel: V6

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    January 28, 2012

    gt500 look!!!

    a much better look than stock. it the same piece that is on the gt/cs edition and gt500 rear. Awesome oem product for a great AM price!!!

    stangto50

    Year: 2011 Submodel: GT Danville, VA

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    August 14, 2012

    Fast and easy install

    The fitment was a tad off here and there but only a perfectionist would notice it. The install instructions are very acurate except it didnt take me 3 hours. it took me exactly 1 hour to do from start to finish and i by no means rushed or had anything ready. I planned on it being 3 hours so i didnt care how quickly i worked at it. I do recommend to have needle nose pliers, says optional but its a must if you want to get some of the push plugs out.

    GrabberBlueDrifter

    Year: 2012 Submodel: GT Netzaberg, Germany

    Helpful (1) (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 18, 2016

    Awesome Product. Better than OEM.

    I was pleasantly impressed by this diffuser. The quality and appearance is better than the OEM part ford had installed on my GT. No instructions provided, but very simple install. Take out the tailights, take off rear wheels (for better access to a few screws), unhook a few wire harnesses, and pop off the bumper. Took me about 2 hours to install by myself. Great product and as always, fast shipping from American Muscle.

    Tyler

    Year: 2012 Submodel: GT Chester, NJ

    Helpful (0) (1)

  • 5/5

    Installation Time: Afternoon

    November 30, 2015

    Finished off the backend

    A pretty simply install. The three clips behind the license plate area are a pain but you just have to keep working them and they will come out.

    KonaGT

    Year: 2012 Submodel: GT Colorado

    Helpful (0) (1)

  • 5/5

    Installation Time: Shop Install

    January 27, 2012

    Huge improvement

    The weakest look on them 2011/12 mustangs is the rear end. This improves it alot and makes it look more muscular and different. for $150 this is a great buy and upgrade

    BlueBayou

    Year: 2011 Submodel: V6 Atlanta, Ga

    Helpful (0) (1)

  • 5/5

    August 14, 2011

    Awsome part and customer service

    First part had a little scratch on the visible area but AM was happy to send me a replacement for free of charge which was in perfect condition. Thanks for the great customer service and email conversation from Karen at customer support. This diffuser gives aggressive look and it is made with high quality material. Installation was easy as well. Very straight forward. This is must have item for all the GTs V6s.

    Dan

    Year: 2010 Submodel: GT

    Helpful (1) (2)

  • 5/5

    Installation Time: Less than 1 Hour

    November 30, 2016

    No complaints!

    I painted the middle to match the vehicle . Other than that its a nice piece. Everything arrived fine and not damaged.

    coyoteFLfivepointoh

    Year: 2012 Submodel: GT

    Helpful (0) (0)

  • 5/5

    October 07, 2016

    Perfect look.

    Quality product. Perfect fit and changes the car dramatically, specially if you have a 2010 V6 with single exhaust ))

    ivanlitus

    Year: 2010 Submodel: V6

    Helpful (0) (0)

  • 5/5

    October 05, 2016

    Met My expectations!!!

    First off, I absolutely love the new look my V6 stang has now! the rear diffuser gave my stang a new aggressive look. The shipping was great also. Took about 2 1/2 hour from start to finish, because I was removing the stock and installing the new diffuser by myself.

    Echo1

    Year: 2010 Submodel: V6

    Helpful (0) (0)

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