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C&L Bypass Valve Adapter - Black (15-20 EcoBoost)

Item 389869
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    Features, Video & Details

    • Turns Factory BPV into a BOV
    • Distinctive Turbo Sound
    • Billet Aluminum Construction
    • Black Anodized Finish
    • No Tune Required
    • Easy Bolt-On Installation
    • Made in the USA
    • Fits All 2015-2020 EcoBoost Mustangs with Stock BPV

    Review & Installation Video

    Review & Install Video

    Hey, guys. Adam here with And today, we're taking a closer look at, installing and listening to the CNL Bypass Valve Adapter available for the 2015 and newer EcoBoosts. Now if you're the owner of that four-banger turbo EcoBoost, it might be in the market for something that's gonna make your S550 sound a little bit more aggressive in the realm of turbo sound by converting your factory bypass valve into essentially a blow-off valve. This is gonna give you that crisp release of the excess boost out into the atmosphere that we all love from turbo vehicles. Now let me explain exactly what this is gonna do. So from the factory, your EcoBoost has what's known as a bypass valve, very typical for factory vehicles with the turbo. Now the bypass valve's job is to re-circulate all of the excess boost, the unused boost, back into the system which prevents you from getting that turbo sound that we all love, the blow-off. Now this particular item here converts that into the blow-off valve by adapting itself, placing itself in between the bypass valve and the charge pipe. What this is gonna do is reroute that excess boost back into the atmosphere instead of back into the system. So instead of re-circulating, it's gonna be atmospheric. Now the atmospheric sound is that awesome pssh that we all know and love, right? So this is gonna give you again that nice crisp sound of all of the excess boost getting pushed out into the atmosphere instead of being re-circulated into this system. Now the cool thing about this is that it's actually a lot more affordable than an actual blow-off valve. Now this one comes in right around 70 bucks and it's made of a CNC machined billet aluminum, so it's made to be a perfect fit to your factory bypass valve and your factory charge pipe. Now one of the big benefits of the bypass valve adapter is that it does not require a tune so you can throw it right onto your factory bypass valve and not have to worry about picking up a custom tune to make it work. If you plan on upgrading either one of those items, you're not gonna be able to use this, this is just to be used with the factory components. If you plan on upgrading your EcoBoost, getting it tuned or even upgrading your charge pipe, you'll probably want to look into an actual blow-off valve instead of this bypass valve adapter to reap the benefits of the blow-off valve. So this guy is strictly for the stock or even mildly modified EcoBoosts. Now the bypass valve adapter from CNL comes in right around 70 bucks and if you compare that to an actual blow-off valve that costs about 250 or even more dollars, this is way more affordable. Now it's available in the black finish that I have here in the billet aluminum but it's also available in the aluminized finish if you're looking to get under the hood a little bit more contrast. This personally I think blends in a lot better under the hood, it doesn't look like an aftermarket part when it's installed but if you're looking to get it to pop a little more, check out the aluminized finish. Now this guy is gonna get a very simple one out of three wrenches on our difficulty meter here, anybody can tackle this in the driveway at home. I'm gonna walk you through every step of the process here from start to finish. What do you say we get started? Tools used in this install include a quarter-inch ratchet, a variety of different size extensions and a three-sixteenths hex socket or an Allen key. All right, now before we get started, I first want to point out where we're going. So if you look right at your coolant reservoir, directly below that, right here at the end of my extension here, this is your factory bypass valve. There are three Allen bolts or hex bolts bolting this guy onto your factory charge pipe. So what we're gonna do is take a three-sixteenths socket and remove these guys. I'm using a couple of extensions just to make it easier for you guys to see so my hand's not in the way, but first what I want to do is get this harness a little bit clear. So you can see the harness is actually connecting to the bypass valve, it's also connected to a couple of studs up here, I'm just gonna pop these plastic clips off and just move this harness out of the way so it's easier to see. So I'll just put this guy up here up and out of the way, just give a little more access. I'm gonna use my extensions and my three-sixteenths socket to remove these three bolts. All right, I'm gonna break all three of them loose and then should be a lot easier. All right, so with them loose, I'm gonna take my ratchet off and just use the extension to back these bolts out. I'm gonna put my hand underneath so it doesn't fall out, there you go. That's one, two more to go. All right, so this guy's up and out of the way. Now you really don't have to unclip this harness, we're going to just so I can show you guys, but you will just pinch and pull directly back. So I'm gonna pull this guy out and let's talk about the difference. All right, so just very quickly we have our factory bypass valve here in my right hand, our CNL bypass valve adapter in my left. Now if you were to pick up an aftermarket blow-off valve, you'd be completely replacing this entire unit. The blow-off valve is just a totally different unit, you'd take this guy out, set it aside, and install the blow-off valve in its place. Now because we're reusing this, the bypass valve adapter is gonna adapt right on to the back end here in between the bypass valve and the charge pipe. This unit here and its specifically formulated and cut holes is gonna re-circulate or redirect that air into the atmosphere instead of back into the system. Now what we're gonna have to do is line up the holes on your bypass valve to the adapter, and it really only goes in one way. So if the holes don't line up, you're just gonna keep rotating it until they do. And then we're gonna use the three longer hex screws or hex bolts included in the kit to adapt it. So what we're gonna do is grab the hardware, put those through, line it up, we'll tighten everything down with just the socket and extension, and then we'll tighten it all back up. So let's do that. All right, now before we get started, couple of things we want to make note of. Again, I already talked about making sure that the holes are lined up, you want to make sure you're doing that before you start, just so you don't have to fidget with it down there. Secondly, the factory bypass valve has this rubber O-ring. If it's in bad condition, you might want to replace that guy. You just want to make sure you're preventing any boost leaks and the same thing goes with the CNL. Now the CNL one comes with brand new dual rubber O-rings, you want to make sure they're seated properly. Underneath that seal is a little indent port, make sure it's seated properly. It's already seated there right out of the box but things get shuffled around. If it's not seated, just double-check. You really don't want to risk any boost leaks, throwing a check engine light or anything like that. So what we're gonna do, just swivel this guy around, make sure we've got it aligned where we want it. We're gonna take the longer screws. I'm gonna put one through just to hold it in place. Let's grab this harness and plug it in and then begin this process. We just want to get one started to hold it in its place. All right, so once you have all of them in place, just go back with your three-sixteenths socket or Allen key and tighten these guys down. There you have it. Well, guys, that's gonna wrap this one up here. So if you want to pick up the CNL bypass valve adapter, it's available in black that I have here, and also an aluminum finish, if you're looking to give it a little more contrast under the hood. You can pick them up right here at

    Distinctive Turbo Sound. The turbocharged EcoBoost Mustang is a great car, but the one thing that hits a sour note with hardcore boost fanatics is the lack of that signature turbo sound. By installing a C&L Bypass Valve Adapter the unused pressurized air will now vent to the atmosphere making that distinct sound all turbo owners know and love.

    Billet Aluminum Construction. Proudly made in the USA from high grade billet aluminum, this C&L Bypass Valve Adapter has been precisely CNC-machined for a perfect OEM style fit. The BPV Adapter is then completed in a black anodized finish for aggressive under hood styling.

    Easy Bolt-On Installation. C&L's Bypass Valve Adapter simply mounts between the factory charge pipe and the stock Bypass valve. C&L includes the necessary hardware needed for an easy bolt-on installation that takes less then an hour.

    Application. This C&L Bypass Valve Adapter is designed for use on 2015 to 2020 EcoBoost Mustangs equipped with the turbocharged 2.3L Inline 4-cylinder engine, that are still running the OEM bypass valve/solenoid. No tune is required for operation.


    Fitment: 2015 2016 2017 2018 2019 2020 Details

    MPN# 389869

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Spacer
    • (1) Large O-ring
    • (1) Small O-ring
    • (3) Mounting Bolts
    Installation Info
    Tech Specs
    Will it fit my Mustang?

      Customer Photos (28) Submit Your Photo

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        Questions & Answers (30)

        5 Top Rated Questions

        Since its running out into the atmosphere, will it make my car run rich? Many online forums say it can make ur car run rich, which leads to it smelling, bad mpg, along with fouling the plugs and cats. I already ordered it but now fear installing it.

        • Using the C&L Bypass Valve Adapter can cause a rich condition on shifts if not used with a tube.

        Helpful (28)

        Hi, can you please tell me if the C L bypass valve adapter will work on the 2018 Mustang Ecoboot 2.3 L engine? The range seems to be 2015 - 2017. Was there a change to the 2018 model that prevents its installation and use?

        • The C&L Bypass Valve Adapter has not yet been tested with a 2018 Model to confirm fitment. Once fitment has been confirmed, we will update the product page.

        Helpful (3)

        do i need any other parts in order to install this blow off or that's all i need to buy

        • The C&L Bypass Valve Adapter will allow your factory bypass valve to vent to atmosphere, rather than recirculate, allowing it to work as a blow off valve. All required components are included.

        Helpful (1)

        Can I use this with my roush intake installed already??? Can I run both valve and intake???

        does this void out the warranty on the car.

        • We recommend speaking with your local Ford Dealership for warranty information when considering this item.

        Helpful (0)
        10 More Questions
        Will I need a tune in order to run this modification? 1 answer
        Is it possible to cram it to fit with the gt350 intake from the ford performance powerpac 1 answer
        does it affect the gas ? 1 answer
        Do i need to remove any stock part in order to install this ? Also, can i take it off after installing it and return the car stock ? 1 answer
        i got a 2017 mustang ecoboost. will this harm the car in anyway or weaken it even after many years ? and does it need to be cleaned regularly like intakes ? 1 answer
        Is it possible for this product to allow unfiltered air into the charge pipe? 1 answer
        Is it legal in California? 1 answer
        Will this Bypass valve work with HPS Intercooler pipes? 1 answer
        I have a new 2018 eco will this void factory warranty if it is installed in a car that has warranty on it 1 answer
        Will this affect my 2016 Ford Mustang EcoBoost premium in any way? Will it affect the turbo? A lot of reviews say that there is a sudden "psshhh" noise while driving on the highway; why is that? And is it bad if it does that? Will this negatively affect the ECU in any way? 1 answer

          Customer Reviews (100+) Write a Review

          Ratings Summary

          4.7 out of 5 overall rating from 100+ customers

          • January 16, 2020

            5 2019 EcoBoost - ROUSHY17


            Super easy to install. Sounds great and doesn’t decrease performance at all. Easy fun mod

            Helpful (0)
          • January 06, 2020

            5 2019 EcoBoost - dylanhtx

            Amazing Sound

            This BOV adapter is 10 times better then i expected. Gives off an amazing sound for about a 10 minute easy install. And way cheaper than any Blow off valve. I would recommend this to anyone.

            Helpful (0)
          • December 31, 2019

            5 2015 EcoBoost - AJMenditto


            this bypass adapter was super easy to install and the sound is insane. definitely a noticeable wooooshhh sound when you let off the gas at around 2500 rpm. don’t waste your money on a real blow off valve unless you want to run high boost, this will do just fine and creates the same sound.

            Helpful (0)
          • December 07, 2019

            5 2015 EcoBoost - twstd50

            Easy to install and it sounds great!!

            Bought this as a gift for my daughter’s boyfriend... it took about 30 mins to install and sounds pretty cool. It’s easier to reach bolts if you unbolt the coolant reservoir!!

            Helpful (1)
          • December 06, 2019

            5 2018 EcoBoost - xJustinx24

            Great sound

            This is a great product off the best mustang websites out there and it’s makes ur mustang ecoboost sound great with all the turbo noise

            Helpful (1)
          • December 06, 2019

            5 2018 EcoBoost - Swooshy

            Love that sound!

            Easy to install and the build quality of this product is just fantastic!

            Helpful (1)
          • December 02, 2019

            5 2016 EcoBoost - Kameron

            Sounds Great

            Love the sound and it was easy to put in so I recommend the purchase

            Helpful (1)
          • December 01, 2019

            5 2019 EcoBoost - RickeyJ

            Perefect fit!

            This is exactly what I wanted. And it works perfect ! You can't even tell that it is there.

            Helpful (1)
          • November 20, 2019

            5 2018 EcoBoost - MtNitro

            Right on the money!

            Makes the perfect sound with out being too loud. Was a easy 15min. Install. Disconnected the boost tube at the turbo and that made it very easy to install all three longer bolts.

            Helpful (1)
          • November 19, 2019

            5 2017 EcoBoost - Brod1801


            Its great it’s worth getting it gets alot of attention with the noise

            Helpful (1)
          • October 30, 2019

            5 2018 EcoBoost - Stangyboi

            Grest price for that classic turbo sound

            Easy to install, sounds great, great price. Would recommend to any Mustang EcoBoost owner

            Helpful (2)
          • October 26, 2019

            5 2017 EcoBoost - MatthewD

            Great product

            easy install! Great sound. At higher cruise speeds it can give a little hiss noise but if radio on you can’t hear it. Well worth the price of this product

            Helpful (1)
          • October 25, 2019

            5 2000 GT - Lghtng02gt

            2019 Ranger

            Picked this up to use on my 2019 Ranger with the 2.3. Worked great, sounds great

            Helpful (1)
          • October 22, 2019

            5 2017 EcoBoost - gleeful

            must have

            must have if you have an exhaust on your musatang, it makes the car sound amazing, i love giving gas then letting go to hear the WHOOOSH sound , oh boy do i love it, it almost sounds like when a truck is being put into park, but like on your mustang! i love it love it!!!!!!

            Helpful (0)
          • October 21, 2019

            5 2019 EcoBoost - Vito

            Great product

            Cheapest product for the crispest sound. 10/10 would recommend

            Helpful (0)
          • October 19, 2019

            5 2019 EcoBoost - todddaniel


            Best purchase so for for my 2019 EcoBoost havent regretted it

            Helpful (0)
          • October 18, 2019

            5 2018 EcoBoost - NiccoF

            Head turner

            I absolutely love the performance of this part. All the quality and sound of your typical Blow Off Valve for a fraction of the cost. ***Word of warning*** I saw this in a previous review too before purchasing this part but want to confirm this. This Bypass Valve is absolutely a nightmare to install on a 2018 Ecoboost Mustang without specific tools, and even then it's still difficult. There are a lot of pipes and parts that are only inches above the area of install. (I managed to get in on without removing or disconnecting anything) but for the more patient I would recommend moving some things around. Overall, well worth it! Especially in regards to the money saved.

            Helpful (0)
          • October 12, 2019

            5 2016 EcoBoost - Leonel115

            Great sound

            This was the first mod for my mustang, and I do not regret it. This provides that amazing sound of a blow off valve for cheaper. This I definitely a head Turner and it really makes your car sound good. Took about 10 min to install, because one of the bolts is hard to get to.

            Helpful (0)
          • October 09, 2019

            5 2015 EcoBoost - Samson305

            One of my favorite mods

            So glad I invested in this. You will fall in love with the sound. Definitely sets you apart from the other cars on the road.

            Helpful (0)
          • October 07, 2019

            5 2015 EcoBoost - Shiva

            C L bypass valve adapter review

            Easy installation. Only took 10 min. and now my car sounds beautiful. Music to my ears!!!

            Helpful (0)

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