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MP Concepts GT350 Style Rear Diffuser (15-17 GT Premium, EcoBoost Premium)

Market Price $400.00 You Save 34% ($134.01)
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$265.99 (each)

+ $49.00 Handling Fee with FREE Shipping

  • Item 397418

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Ship to: Ashburn - 20149
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    Features, Video & Details

    • Aggressive GT350 Inspired Styling
    • Durable Injection Molded ABS Material
    • Features a Stippled Grained Texture
    • Straight Forward Installation - Cutting Required
    • Backup Sensor Compatible
    • Intended for use with Aftermarket Quad Exhaust Systems
    • Designed for Premium Chassis Packages Only (Trim Levels: 200A/201A/400A/401A)
    • Fits 2015-2017 GT Premium and EcoBoost Premium Mustang Models

    Review & Installation Video

    Review & Install Video

    Race Inspired Appearance. Add a serious race look to your 2015-2017 Mustang with the MP Concepts GT350 Style Rear Diffuser. This is designed to fit only premium bumpers, but it will enhance the whole look of your Pony thanks to durable construction and personal touches.

    Quality Construction. MP Concepts manufactures their GT350 Style Rear Diffuser from injection molded acrylonitrile butadiene styrene (ABS) plastic using the original OEM CAD data from Ford to ensure a perfect fit. ABS is an extremely strong material known for its light-weight, superior durability and impact resistance - making it perfect to withstand the hazards of daily driven vehicles. This Rear Diffuser is completed in a fine grained stippled texture for a factory look that helps to hide the appearance of rock and stone impacts.

    Straight Forward Installation. Installation of the MP Concepts Rear Diffuser is simple and straight forward. However, it will require permanent modification to the stock rear bumper cover to remove a section of the factory diffuser. Installation can be completed in about two hours. Reuses factory reflectors.

    Backup Sensor Compatible. This MP Concepts Rear Diffuser can be installed on Mustangs equipped with or without factory installed back-up sensors and will not affect sensor operation.

    Optional Single Exhaust Outlet Insert. If you love the aggressive good looks of the MP Concepts GT350 Style Rear Diffuser, but are running a standard single exit exhaust system on your 2015-2017 Premium Package Mustang, check out these Single Exhaust Outlet Inserts from MP Concepts. The MP Concepts GT350 Style Rear Diffuser was designed with Quad Exhaust Systems in mind, but by installing a set of MP Concepts Single Exhaust Outlet Inserts your single exhaust tips will look right at home in the diffuser. Sold separately - see buy together options above.

    Application. This MP Concepts GT350 Style Rear Diffuser is specifically designed to fit 2015-2017 GT and EcoBoost Mustangs equipped with the factory Premium Chassis Packages only (Trim Levels: 200A/201A/400A/401A). Intended for use with aftermarket quad exhaust systems.

    Please Read. If you are having trouble determining what style bumper your Mustang is equipped with please refer to the comparison image above.

    Fitment: 2015 2016 2017 Details

    MPN# 397418

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Diffuser Panel
    • (2) Reverse Light Brackets
    • (2) Tail Pipe Inserts
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    Questions & Answers (21)

    5 Top Rated Questions

    Will this fit/connect right up to the roush valence?

    • The MP Concepts GT350 Style Rear Diffuser will be compatible with the Roush models, as these will have the same bumper as the premium trim levels.

    Helpful (2)

    Why does this product only fit the premium models and is there any solution to getting a GT350 diffuser on a base model GT?

    • The MP Concepts GT350 Style Rear Diffuser will only fit premium models as they have a different rear end and different mounting spots. We do have the GT350 rear diffuser and bumper that will work for the base models.

    Helpful (1)

    Will this work with the Roush Axle-Back Exhaust single tip?

    • The MP Concepts GT350 Style Rear Diffuser will accept single tip exhausts, however slight modification is required.

    Helpful (0)

    Is there a way to make this diffuser fit without buying the premium bumper?

    • Unfortunately, the MP Concepts GT350 Style Rear Diffuser will require a premium chassis bumper to fit due to different dimensions. At this time, we have no recommended way for this Diffuser to fit the "Non-Premium" bumpers.

    Helpful (0)

    Do will fit using the stock mufflers except changing to quad tips 3.5?

    • Yes, this diffuser is compatible with the stock mufflers along with 3.5" quad tips.

    Helpful (0)
    Post Your Question
    10 More Questions
    What’s the biggest size quad tips I can run on this ? 1 answer
    Will this bumper block my backup sensors? If so is there a alternative that has holes for backup sensors already. 1 answer
    What is the min and max quad tip inch to fit in those holes ? I do have roush axle backs bought from AM but need to buy quad tips to fit into that. 1 answer
    Please clarify whether this will work with the standard corsa sport or extreme catback system. In one posted question your staff says "Yes" and in other they say "No" 1 answer
    will this exhaust be compatible with the magnaflow competition catback quad tips 1 answer
    Will this fit a 2018 model mustang? 1 answer
    Is there a list of quad exhaust systems that are compatible with this diffuser? I'm specifically interested in trying to pair this with a magnaflow competition catback exhaust with quad tips. 1 answer
    will the Corsa Pro Series Quad 4 in. Exhaust Tip Kit work with this product 1 answer
    Will the 3 in corsa xtreme cat-back fir in this valence? 1 answer
    I know I have to cut out spots for the sensors, but does this come with a template sheet to do that or do I have to do that by eye? 1 answer

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    Customer Reviews (10) Write a Review

    Overall Rating 4

    out of 5 stars

    Installation Time:Afternoon

    • Protection 4.2 4.2
    • Fit 4 4
    • Appearance 4.5 4.5
    • Bang For Your Buck 4.4 4.4

    • 5/5

      Installation Time: Afternoon

      January 15, 2019


      Texture matches OEM plastics. Fairly easy to install you do not need to remove the bumper or jack up the car however this will save you time). Straightforward instructions and was half off when I bought it so can't beat that price.


      Year: 2015 Submodel: GT

      Helpful (1)

    • 3/5

      Installation Time: Afternoon

      December 26, 2018

      Looks great but doesn’t fit Corsa

      It looks really good but it took forever to get it to fit Corsa. A lot of messing with it had to be done. Took a professional 4 hours to figure out.


      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      September 17, 2018

      Love it!

      Installed this on my 2017 GT. The fit was perfect. Snapped right in. Looks fantastic with the Rousch quad tip exhaust. Looks so much better than the factory valence.


      Year: 2017 Submodel: GT

      Helpful (1)

    • 1/5

      August 27, 2018

      Don't reccomend

      Well the product would have been fine if an AM rep hadn't given me the ok that this would be a perfect fit with the corsa sport quad tip exhaust, now im stuck with a look I had never intended.


      Year: 2017 Submodel: GT

      Helpful (5)

    • 4/5

      July 12, 2018

      Easier way to switch to quad tip.

      Installation wasn't too difficult and fit pretty well. By far the cheapest and easiest way to switch to a quad tip exhaust. Worked decently well with my roush axleback when i installed with flowmaster FLO-15307 exhaust tips.


      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      January 30, 2018

      Gt350 style Diffuser

      The item Fitment was perfect the only thing is when you take it to get it installed make sure they put some type of Special glue to make it stick to the bumber your body shop or whoever puts it on will know..not everything that gets installed fits perfect in makes your mustang look a lot Cool


      Year: 2016 Submodel: EcoBoost

      Helpful (4)

    • 2/5

      December 04, 2017


      I just got my diffuser after extra delivery time don’t why it took two weeks also when I opened the box and inspected the pieces I noticed about 5 plastic tabs where bend and broken off the tabs that connect the exhaust pipe panel .. and on top of that I got no install guide and no light panel inserts so I talked to them and told them I already hadn’t to postpone install and that I don’t have much off time . And to my luck I have to wait another week and a half to install my set up what a buzz kill .. completely don’t understand


      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      November 07, 2017

      Same lower piece for MPConcepts GT350 Bumper

      I bought the GT350 MP Concepts bumper and the lower valence was damaged. After obtaining a spare valence for the premium bumper “only” it does also work as a replacement if you originally bought the MP Concepts rear bumper.


      Year: 2017 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      July 20, 2017

      Rear vallance

      Got the new mod in and it was just the look my pony needed.. I was worried that the texture of it would be heavy and not match the rest, but it was even more smother that the factory's which is a good look!! Very nice !!!! U don't need to pull the bumper to replace it as well ..


      Year: 2016 Submodel: GT

      Helpful (9)

    • 5/5

      Installation Time: Afternoon

      June 29, 2017

      Looks beautiful and aggressive!

      Really brings out the aggressive look of the mustang! Beautiful!


      Year: 2017 Submodel: EcoBoost

      Helpful (3)

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