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Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe (15-20 EcoBoost)

Item 389694
Market Price $310.99 You Save 12% ($36.04)
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      Review & Installation Video

      Stephanie with, here with the Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe, available for 2015 and up EcoBoost Mustangs.This Resonator Delete Y-pipe is going to be for the S550 EcoBoost owners out there that are looking to increase the sound level of their car quickly and without necessarily having to spring for an entire new exhaust system. Replacing the resonator with a Y-pipe can totally change the sound of the car, even with the stock axleback still installed. The resonator delete is firstly going to free up some power and, of course, volume since it will be replacing that restrictive factory resonator with a stainless steel Y-pipe that's more free flowing. And like I just mentioned, one of the cool things about this Y-pipe is that you can pair it with your stock mufflers for a change of exhaust note, or you can run it with an aftermarket axleback. But either way, you'll still maintain the use of your stock cats which will save you money and also keep you legal at the same time. A great side effect of replacing that resonator with the Y-pipe is a good deal more turbo noise, which I always think is a good thing, and you're going to notice a lot more turbo noise no matter what your axleback situation is. So on a scale of one to five, with five being the loudest, and keeping in mind that you're still going to have your stock cats, I'd rate this Y-pipe as a solid two with the factory axleback. It definitely opens up some sound, but it's not overbearing or crackly or too raspy with the factory axleback. But just to test things out a little, we also installed a Flowmaster axleback so you can hear what they sound like paired, and I'd rate that combo as a four on the loudness scale. At that point, everyone's going to hear you coming, and the pair have more of a raspier tone for sure, with a decent amount of crackling and lots of turbo noise and gurgle. As far as price goes with this Y-pipe resonator delete, it costs right in between $200 and $300, and as of right now, it's the only Y-pipe on the site that's currently available. And if you think about it, if you pair this with an aftermarket axleback, you've effectively created a cat-back for your EcoBoost, and you paid a lot less for it. You're welcome for that little side note. As for the install, you will be reusing your stock hardware, and like the name suggests, there will be some cutting involved but nothing too difficult. If you take your time, it's probably going to take about two hours to complete, and I'm going to call this two out of three wrenches on the difficulty meter, but mainly just because of the cutting that's involved. So overall this is a stainless steel resonator delete y pipe that can work with either the factory axleback or an aftermarket one. It also works with the factory cats, and it's going to free up some sound from the EcoBoost. As always, check it out more for yourself, and for all things Mustang, keep it right here at

      Product Information

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


      • Converts Factory "Resonator" Mid-Pipe to an "Y" Pipe
      • Improves Exhaust Flow and Sound
      • Muscle Car Rumble
      • 409 Stainless Steel Construction
      • Cut and Clamp Design
      • Reuses Stock Catalytic Converters - Smog Legal
      • Fits All 2015-2020 EcoBoost Mustangs


      Improves Exhaust Flow. Add even more horsepower and torque to the rear wheels of your Turbocharged S550 EcoBoost Mustang by replacing your restrictive factory Resonator Mid-pipe with a free flowing Flowmaster Scavenger Series Resonator Delete Y-Pipe. A Flowmaster Y-pipe will greatly improve your pony's exhaust flow for an increase in overall performance.

      Muscle Car Rumble. Flowmaster's free flowing Y-Pipe for the 2015-2020 EcoBoost Mustangs not only eliminates the factory resonator to help increase power, but it also adds a deep muscle car rumble to the sound of your exhaust with its classic "Y" crossover pipe design.

      Reuses Stock Cats. This Flowmaster Scavenger Series Y-pipe requires cutting and removing the factory Mid Pipe resonator and clamps in place reusing the stock clamps. Best of all it reuses the factory catalytic converter saving you money and keeping you legal at the same time.

      Stainless Steel Construction. Manufactured in the USA from durable 2.25" diameter free-flowing mandrel bent 16 gauge 409 stainless steel tubing for it's corrosion resistant properties, this Flowmaster Scavenger Series Y-Pipe will improve exhaust flow and last a lifetime.

      Application. The Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe is specifically designed for use on the 2015-2020 EcoBoost Mustangs equipped with the 2.3L Turbocharged engine.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# 81108

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (54)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 54 customers

      Installation Time: Afternoon

      Installation Cost: 0-$100

      • December 22, 2019

        5 2016 EcoBoost - Alec Installation Time: Less than 1 Hour

        Cheap install and great Sound!

        Love the sound. I matched it with a flowmaster outlaw axel-back and the result was great.

        Helpful (0)
      • August 30, 2019

        5 2015 EcoBoost - JohnW Installation Time: Less than 1 Hour

        Great Value

        I have really enjoyed the new feel and sound of my Y pipe.

        Helpful (0)
      • March 14, 2019

        5 2007 GT - JoseA

        Very nice easy instal

        Love it great and easy instal wish it would have have alittle more noise but all in all has alittle more grumble down low

        Helpful (0)
      • March 13, 2019

        5 2017 EcoBoost - Mike Installation Time: Afternoon

        Works Perfectly

        I paired this with the factory exhaust sounds good and does not drone. Easy to install worked out good.

        Helpful (2)
      • March 11, 2019

        5 2018 EcoBoost - Krishana Installation Time: Afternoon

        Recommend it!

        Fits perfect replaced resonator and makes pops paired with axleback amazingly. I have the MRT axle and it pairs up perfectly and is a very good sounding exhaust. Takes off that very restricting stock resonator and sure is worth the buck. Check it out on my insta @ktbaka_stang.

        Helpful (1)
      • February 26, 2019

        5 2017 EcoBoost - BobbyK

        Deeper growl

        Love it along with the outlaw axle back, gives the mustang a deeper tone and definitely louder.

        Helpful (4)
      • November 01, 2018

        4 2016 EcoBoost - Dawood Installation Time: Shop Install


        Joint this with my Flowmaster axel back sounds good !

        Helpful (4)
      • September 04, 2018

        5 2018 EcoBoost - Rohanjae Installation Time: Less than 1 Hour

        Best pipe

        This thing sound amazing was easy to install too if you got the right tool and a helping hand to assist you

        Helpful (4)
      • August 09, 2018

        2 2016 EcoBoost - Marelyn


        I was informed prior to ordering this y-pipe that it would pair up with the MBRP Catted downpipe I also ordered with no modification. Come to find out upon receipt of the items that the y-pipe and extension piece of the down pipe are finished in 2.25 diameter, which means I can’t fit the extension piece into the y-pipe without some modifications, which means now I have to go to the muffler shop and spend a couple of hundred dollars to get the system installed an expense and time delay I wasn’t expecting.

        Helpful (4)
      • August 02, 2018

        5 2017 EcoBoost - DaleL Installation Time: Less than 1 Hour

        Y pipe

        Easy install. Not loud just a little purr. You want loud you will have to install some different mufflers.

        Helpful (4)

      Questions & Answers (33 answers)

      5 Top Rated Questions

      Will this fit a 2019 ecoboost with active exhaust?

      • This will fit all 15-19 Mustang EcoBoost models.

      Helpful (2)

      Will the y-pipe work with the Roush Quad Tip Passive Axle-back Exhaust for the Ecoboost Mustang

      • The Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe should mount in the stock exhaust locations. So since the Roush Quad Tip Passive Axle-Back Exhaust would connect to the stock exhaust, it should work with this Y-pipe.

      Helpful (2)

      I purchased the Flow Master Outlaw Axleback #525581 a few months back and like it. Now I want to know if this Flow Master Ypipe #389694 will mate directly to that Axleback system. I don't want to buy the Y pipe and then discover during the install that the Y pipe ends don't mate with the Flow Master outlaw axle back piping and I have to go search for a adaptor for each of the Y pipe ends to mate to the axleback piping. Thanks,

      • The Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe will pair up with your axle-back system with no problems! It will be a great addition and definitely help free up some horsepower.

      Helpful (2)

      I want to add this to my Roush Power Pack level 2 I already have on my ecoboost. Would this work with the Roush power pack tune?

      • The level 2 Roush Power Pac's axleback exhaust will work with the Flowmaster Scavenger Y-Pipe. Since this unit will still utilize the stock catalytic converters, it will be compatible with the tune.

      Helpful (1)

      Would this Y-Pipe work with the factory active exhaust on a 2019?

      • Yes, this would work with an otherwise stock application.

      Helpful (0)
      10 More Questions
      Would this fit with the cv fab catless downpipe? If not which one could i pair with this pipe? 1 answer
      Does the Y-pipe require a tune? 0 answer
      Should I have it welded ? Or use clamps only ? I want to be able to remove Incase I need to take to dealer 1 answer
      Will this require a tune? 1 answer
      Will this y-pipe fit the AWE Touring Axelbacks? The pipe size on the AWE is 2.5. 1 answer
      Would it be possible to mate this item with a Borla ATAK axleback? 1 answer
      Hi, I just bought the Nxt Step Performance axle back for my ecoboost 18, will this fit this y pipe with no problems? Thanks 1 answer
      I'm going to be ordering the Flowmaster American Thunder axleback exhaust; will this mate directly to it, or will any adapters be needed? 1 answer
      The two compatible??? 1 answer
      Is it legal in California and will it pass the smoge? Will it fits if deleted the mufflers to? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Y-Pipe

      Tech Specs

      Mid Pipe Specifications
      Style Mid Pipe: "Y"Type Headers Required:Shorty Headers or Stock Manifolds
      Piping Material:409 Stainless SteelPiping Size:2.25"
      Catalytic Converter:Reuses stock Catalytic ConvertersFitment:2015-2017 EcoBoost

      Will It Fit My Mustang

      • EcoBoost - 15, 16, 17, 18, 19, 20

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