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

Item 397418
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Market Price $400.00 You Save 34% ($134.01)
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$265.99 (each)

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      Review & Installation Video

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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


      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.

      MP Concepts

      Fitment: 2015 2016 2017 Details

      MPN# 397418

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (15)

      Write a Review

      Ratings Summary

      3.7 out of 5 overall rating from 15 customers

      Installation Time: Afternoon

      • January 29, 2020

        5 2017 EcoBoost - garrettL Installation Time: Afternoon

        Great for the price

        Overall a solid product. Installation was easy, fit was good, and it has an amazing appearance. Totally changed the look of the rear of the car!

        Helpful (0)
      • December 19, 2019

        1 2016 EcoBoost - RunCMC69


        Bought this for my 2016 Mustang Ecoboost Premium and it did not fit. You’re supposed to cut a piece of the existing valence to put on this new diffuser on and now I cannot put the old one back one. The new diffuser does not stay on and the clips don’t align. Do not buy this product unless you want to have no valance.

        Helpful (0)
      • October 05, 2019

        3 2015 GT - Ankak1106 Installation Time: Afternoon

        A True Statement Upgrade

        I could not be happier with the outcome. I was able to get help from a friend who recommended to take the bumper off. I thought he was crazy for that, but After all the stuff we had to do... I am so glad we did. We were able to knock this out in just a little over an hour, but I absolutely recommend taking your time and having patience. There is a lot of information left out of the install video. The end result will not disappoint. Paired this with the AWE track exhaust and WOW!

        Helpful (0)
      • April 27, 2019

        2 2017 EcoBoost - Chris

        No it doesn't fit the EcoBoost Premium

        This piece does not fit the 2017 EcoBoost Premium without major cutting of the stock bumper. Make sure your diffuser is a separatable piece from your bumper cover before you order. A body shop could likely make it work, but most without that access will find it near impossible.

        Helpful (1)
      • April 01, 2019

        5 2015 GT - Marisha Installation Time: Afternoon

        This was a great buy

        I just love the new upgrade . I have gotten so my compliments on my diffuser it took me less then 2hours for the complete install

        Helpful (0)
      • January 15, 2019

        5 2015 GT - MichaelT Installation Time: Afternoon


        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.

        Helpful (2)
      • December 26, 2018

        3 2017 GT - Andjb Installation Time: Afternoon

        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.

        Helpful (3)
      • September 17, 2018

        5 2017 GT - Germinator

        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.

        Helpful (1)
      • August 27, 2018

        1 2017 GT - KhalidS

        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.

        Helpful (7)
      • July 12, 2018

        4 2017 GT - 86fiveoh06foursix

        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.

        Helpful (3)

      Questions & Answers (23 answers)

      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 fit a '15 GT Performance Package?

      • As long as you have a '15 GT Premium with the Performance Package this would fit your mustang.

      Helpful (0)

      Will this rear diffuser work with ?

      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)
      10 More Questions
      Is there a way to make this diffuser fit without buying the premium bumper? 1 answer
      Do will fit using the stock mufflers except changing to quad tips 3.5? 1 answer
      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

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Diffuser Panel
      • (2) Reverse Light Brackets
      • (2) Tail Pipe Inserts

      Tech Specs

      Will It Fit My Mustang

      • EcoBoost - 15, 16, 17
      • GT - 15, 16, 17

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