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K&N Drop-In Replacement Air Filter (15-20 GT, EcoBoost, V6)

Item 389635
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$56.99 (each)

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      Review & Installation Video

      Hey, guys, Adam here with Today I'm bringing you a quick overview and installation of the K&N drop-in replacement air filter, which will be fitting all 2015 and newer Mustangs. So in this video, I'll be going over the benefits of adding the K&N drop-in filter to your S-550, and I'll even touch on the materials and construction. I'll top the video off with the install, which I'll let you know upfront gets a one out of three wrenches on our difficulty meter, because it really is a simple drop -in replacement. The K&N drop in replacement filter I have here today will be for any 2015 or newer Mustang owner who's looking to pick up a more effective air filter to keep out the harmful elements, while also increasing a slight throttle response difference as well as the acceleration.Now even though the S-550s are relatively new, it's also gonna be for the guys out there who have a high mileage S-550 and it's really just time for a replacement. This is going to be a direct fit replacement for that stock air box filter, and does perform a lot better considering it is a part of the famous K&N construction. So K&N has been making air filters such as this for a very, very long time. And because of that, they're one of the most well-known options on the market and one of the most effective at that. Now with that said, all that K&N construction I'll touch on in just a second. But I do want to point out this is going to be one of the options out there that will be a lot less expensive than picking up an entirely new air box system as a replacement. So instead, this is gonna be for the guys out there who are on a budget and wanna just pick something up really quick and easy in order to get that throttle response and acceleration increase. Now with that said, if you're picking up an after market cold air intake or air box, this option from K&N is not going to be for you. This is specifically designed to work with the stock air box and for the guys out there only looking for an air filter replacement and not an entirely new system. So K&N does claim that this will increase your throttle response and acceleration off the line. But, of course, guys, I don't want you to expect a world of difference when it comes to horsepower and torque gains. I would just expect some single digit increases in that department. Now with that said, you can expect a slight increase in the throttle response, acceleration, even the engine growl, and, of course, the performance as far as keeping out the harmful elements. Now that's all gonna be thanks to the materials and construction that go into this from K&N. K&N does construct this out of layers of specially treated cotton gauze, which are sandwiched between epoxy coated layers of wire mesh. Now in between that, they have a special grade oil, which, of course, is very specific to K&N's process, very unique to their own construction, which then fills in the layers in between the cotton and gauze at each one of their strands. If you are interested in picking up the drop-in replacement air filter for your stock air box, expect to be spending just about 50 bucks, a very reasonably, budget friendly price tag here, significantly less than an entire stock air box replacement. Shifting gears over to the install, if you can even call it that, like I said in the beginning, this one's gonna get a one out of three wrenches on our difficulty meter. It's a drop-in replacement filter. It does just exactly that. All you'd have to do is pop open your stock air box, pull out the factory air filter, and drop in the drop-in replacement. Of course, it really is that simple. Just take a minute or two of your time in the driveway at home. Doesn't require any fancy tools and will get the one out of three wrenches on the difficulty meter. And just to wrap things up for this overview and install, if you're the owner of a 2015 or newer Mustang and you're looking to swap out your factory air filter for something a bit more effective, or if you've got some high mileage and just need that replacement, you might want to check out the K&N drop-in replacement air filter, which, of course, can be found right here at

      Product Information

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


      • Improves Horsepower and Acceleration
      • Filters Out Harmful Contaminants
      • Red, Oil Treated, Cotton Gauze Construction
      • Flat Stock Style Air Filter
      • Filter is Washable and Reusable
      • Easy Drop-In Replacement
      • Backed by K&N's Million Mile Limited Warranty
      • Designed for use with the Stock Air Box
      • Fits All 2015-2020 Mustang Models


      Improves Air Flow for More Power. Now you can improve the performance of your 2015-2020 S550 Mustang with a K&N Drop-in Replacement Air Filter. By simply replacing your restrictive stock paper element with a new, high flow cotton gauze K&N filter you will see an increase in power, performance and acceleration - all while still providing excellent air filtration.

      Filters out harmful contaminants. This Drop-in K&N Replacement Filter successfully filter's out harmful contaminants with its unique layered design. K&N Air Filters are made up of layers of specially treated cotton gauze that are sandwiched between two epoxy-coated aluminum wire screens for durability. K&N uses a specially formulated grade of oil to treat the cotton gauze layers which causes a tackiness throughout the cotton's microscopic strands creating a powerful filtering media that ensures engine protection.

      Washable, Reusable Filter. K&N designed their high flow air filters to be reusable. That means there is no need to buy a new filter every few thousand miles, you can just clean the filter, re-oil it, and save money with a K&N Filter Recharge Kit.

      Drop-In Replacement. This K&N Air Filter was designed to be a direct fit drop-in replacement for the original factory air box, with no cutting or trimming required for installation.

      Million Mile Limited Warranty. K&N Replacement Air Filters are backed by a Million Mile Limited Warranty when used primarily on paved roads and on vehicles for which they were designed. If one of these products ever fails to provide complete satisfaction, K&N will replace it. Some exclusions may apply, please see manufacturer's warranty for details.

      Application. This K&N Air Filter is designed to be a drop-in replacement for the stock air box on all 2015-2020 V6, GT and EcoBoost Mustangs.

      Note: Coupon codes cannot be applied to this product.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      K&N 33-5029

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 100+ customers

      • May 22, 2020

        5 2017 V6 - ChrisP


        I completely notice a difference as soon as I put it in. Amazing product no defects fully recommend it to anyone out there

        Helpful (0)
      • May 16, 2020

        5 2018 EcoBoost - MKelly

        2018 Mustang ecoboost

        You can tell the car breathes better with this filter! I recommend getting one!

        Helpful (0)
      • May 15, 2020

        5 2016 GT - ZackP

        Nice replacement

        Stock filter was looking pretty dirty after almost 30K miles. Got this because it is reusable. Never have to buy another one again.

        Helpful (0)
      • May 08, 2020

        5 2015 GT - Coyotedriver15

        Worth the money

        Great OEM style filter replacement. Don't need to replace ever again, well worth it.

        Helpful (0)
      • March 29, 2020

        5 2018 GT - Tyeayo1

        Easy peasy install

        Fitment was perfect, no issues at all! Part felt sturdy and well made, no complaints here

        Helpful (3)
      • March 24, 2020

        4 2016 EcoBoost - StevenU

        More air

        Don't really notice any difference in performance but I wasn't really looking for any.

        Helpful (3)
      • March 21, 2020

        3 2017 GT - MSW

        2017 GT

        The air filter is much sturdier than the factory but I have to be honest I noticed a little to no gains in acceleration or sound. Truth of the matter is if you're getting this you're getting it to keep more contaminants from your engine block, if you want gains and horsepower spring for a cold air intake.

        Helpful (3)
      • February 28, 2020

        5 2019 EcoBoost - Proie

        Just right

        Not a bad price for a little bump of throttle and a much more quality part!

        Helpful (3)
      • February 01, 2020

        5 2015 EcoBoost - Parth

        East to install, drop in replacement filter

        Did not take too much time to fit this in the stock air intake. Great experience!

        Helpful (3)
      • December 09, 2019

        5 2018 GT - mrblackbond

        Easy as 1-2-3

        Simple install. Did not notice any difference in power gains but wasn't expecting. If you want to upgrade your airflow without the risk of voiding the warranty, this is it.

        Helpful (4)

      Questions & Answers (16 answers)

      5 Top Rated Questions

      Will this oiled filter harm mass air flow sensor

      • The K&N Drop-In Replacement Air Filter will not harm the Mass Air Flow Sensor.

      Helpful (13)

      What is a safe method of washing this air filter?

      • K&N offers a recharge kit which offers their cleaning solution and oil specifically designed for their filters. Their kit provides exact instructions for cleaning and oiling, however the basic instructions are listed below: STEP 1 - Apply air filter cleaner STEP 2 - Rinse your filter STEP 3 - Dry the air filter STEP 4 - Apply oil to filter

      Helpful (5)

      When first installing do you need to oil it up or it comes from the box oiled ?

      • The drop-in filter will be pre-oiled and can be installed right away.

      Helpful (3)

      Will someone explain to me, other than the obvious buying from a dealer, is Ford charging $500 and one can buy the exact product here for $50 ? Does the dealership tune it? Just curious and needed to ask someone who is smarter about this than me!

      • Yes, the $500 package is the K N filter, cal pro adapter, and a custom tune from FRPP. I believe thats just the package cost, they will charge you for installation as well, I'd imagine at least $100, if not $300, to do it. However, you will get a FRPP 3yr 36,000mile warranty (from date of manufacture, I believe) if Ford or an ASE certified technician does the install.

      Helpful (3)

      Can i Install with 300 miles on the car only?

      • It doesn't matter how many miles are on your car, this will work regardless.

      Helpful (2)
      Post Your Question
      10 More Questions
      I have a 2017 ecoboost with the muffler removed and the stock axle back, just the noise interests me, this air filter can be good for the sound of the engine? (In France simple modifications such as air boxes or the gain of more than 30hp are not legal so it's complicated to find something to change the sound of the engine) 1 answer
      how much estimated hp this filter adds 1 answer
      If Bought a Cold air intake is there any reason to buy this? 1 answer
      What's the difference between this item and the "Ford Performance by K N Drop-In Replacement Air Filter"? 0 answer
      This appears to be the same filter as "Ford Performance by K N Drop-In Replacement Air Filter" Is the Ford Performance version $17 more because of "Ford Performance" or is this one truly a different more restrictive filter? 1 answer
      Do you sale the cleaning kit for this product? 1 answer
      Will this void any factory warranty on the car? 1 answer
      Will the oil in the filter affect the air flow sensor? 1 answer
      What type of oil needs to be used and how is the oil added after cleaning the filter? 1 answer
      Will this make my check engine light or any other service light go off? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Air Filter

      Tech Specs

      Will It Fit My Mustang

      • EcoBoost - 15, 16, 17, 18, 19, 20
      • GT - 15, 16, 17, 18, 19, 20
      • V6 - 15, 16, 17

      For Stock Air Box

          Related Mustang Categories