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K&N Series 57 FIPK Cold Air Intake (04-08 4.6L F-150)

Item T525661
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      Product Information

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


      • Improves Horsepower and Acceleration
      • High Density Polyethylene Intake Tube
      • Filters Out Harmful Contaminants
      • Filter is Washable and Reusable
      • No Computer Tune Required
      • Simple Bolt-On Installation
      • CARB EO Number: D-269-31, D-269-34 or D-269-37
      • Fits 2004-2008 4.6L F-150s


        Your New Powerhouse. Enjoy your new powerhouse of a truck after you install the K&N Series 57 FIPK cold air intake. It goes on fast and removes that inefficient paper filter for a smooth flowing cotton setup. You'll notice power boosts that make your truck more capable and fun to drive around. Add this setup to your pickup and you'll be towing more, driving faster and making the most of your ride before you know it.

        Tuning isn't Necessary. You don't have to tune to power up your truck and this kit proves it. There's no tuning requirement at all. In fact, it's fine to leave your truck stock and to slip on this intake. Do so and you'll enjoy the full benefits.

        Advanced Filtering Technology. This K&N intake system features as state-of-the-art filtering setup that's made to capture as much nasty particles as possible while enhancing your engine as well. The kit uses oily cotton that particles stick to. There are several layers sandwiched between aluminum mesh that captures just about everything quickly and efficiently. You'll be amazed at the performance of the set. It's also fully washable so you can keep using the same filter for hundreds of thousands of miles.

        Tough Construction. K&N builds with longevity in mind. This intake features a polyethylene tube that is insulated and heat resistant and wide enough to let air flow freely. It comes with stainless steel hardware and features premium aluminum and cotton filtering components that hold up well over time and are fully washable.

        Slip On Installation. Slip this intake onto your truck in record speed with this simple kit. You remove the old components and lock the new ones in with ease using the included bolts. That's all there is to it.

        Protection for a Lifetime. The K&N Million Mile Limited Warranty covers this kit.

        50 State Approval. No matter what state you live in, this intake will pass smog tests. That's because it's rated CARB EO Number: D-269-31, D-269-34 or D-269-37.

        Application. The K&N Series 57 FIPK Cold Air Intake System is specifically designed to fit the 2004-2008 F-150s powered by the 4.6L V8 engine.

        Technical Note. The K&N Cold Air Intake is not designed for vehicles equipped with a Body Lift.

        Shop All Truck Parts And Accessories

        Shop All Cold Air Intakes For Trucks

        Shop All Truck Intakes: Air Intakes And More

        Fitment: 2004 2005 2006 2007 2008 Details

        K&N 57-2557



        CA Residents: WARNING: Cancer and Reproductive Harm -


        Customer Reviews (10)

        Write a Review

        Ratings Summary

        4.8 out of 5 overall rating from 10 customers

        Installation Time: Afternoon

        • May 22, 2019

          5 2007 King Ranch - Danny Installation Time: Afternoon

          Big difference

          It defiantly adds power and throttle response. I have to add that it is so much louder and I could do without that at my age.

          Helpful (1)
        • January 12, 2019

          5 2008 - TimothyK Installation Time: Less than 1 Hour

          Good instructions. Fits well.

          Instructions were clear and easy to understand. Definitely notice better throttle response

          Helpful (2)
        • January 10, 2019

          5 2005 XL - RyanM Installation Time: Less than 1 Hour

          Good product

          Great product, easy to install, gained Hp an some Mpg and better throttle response, just wish the heat shield hole that the pipe goes through was smaller or had some type of weather strip to close the gap

          Helpful (4)
        • August 23, 2018

          5 2006 STX - ClydeC Installation Time: Afternoon

          K N 57 FIPK Cold air intake

          The intake arrived promptly. I unboxed it and laid it all out. I read over instructions once and began installation. It took 90 minutes start to finish. Absolutely no problems at all. It makes a difference you can tell. More giddy up and the sound is awesome. I highly recommend this product.

          Helpful (8)
        • May 23, 2018

          5 2006 STX - MickeyS Installation Time: Less than 1 Hour

          K N quality product

          It fit perfectly, very easy to install and I love the way my truck sounds.

          Helpful (7)
        • August 26, 2017

          5 2005 - TJ Installation Time: Less than 1 Hour

          Great product

          Easy install, took a little over an hour. 1-2 miles per gallon better mileage, better sound. Had a little whistle when first installed, but went away after driving for about 2 hours. Totally satisfied with the purchase.

          Helpful (7)
        • May 23, 2017

          4 2005 FX4 - Luckstone Installation Time: Afternoon

          Great product for my Triton but ran into a snag

          Everything about this particular cold air intake was top notch, except for the adapter that comes with it that relocates your throttle body. When I finished putting everything together and started my truck I was getting a god awful high pitch humming sound from right around the throttle body. Found out that the included gasket between the throttle body and the elbow adapter was causing a bad air leak because the rather thin plastic on the adapter begins to bend as soon as you put any torque to it at all. I ended up using some Permatex RTV silicone gasket maker on the top of the elbow between it and the throttle body, as well as between the elbow and the intake manifold. Once I did that and let it cure for 24 hours I was in business, no more leak. In addition where the throttle body is mated to the elbow I added some nuts to the back side of the bolt for extra strength as it did not come with any. In the end I was very happy with the new intake. Looks great in the engine compartment and opened up lots of space to access the motor. Truck seems to get up to speed a little quicker without any additional effort. If KandN can figure out a better way with the elbow so that there are no air leaks I would definitely have given it 5 stars.

          Helpful (8)
        • February 28, 2017

          4 2007 Harley-Davidson Edition - Jim Installation Time: Afternoon

          Second cold air kit

          I previously had a simple version with a filter and new air horn with the original air box remaining in place. It did well, but this is well worth the time and effort to get a better response and another 1 mpg increase for my HD edition F150. The kit moves the throttle body up off the intake and puts it on the curved riser in the kit. The overall assembly is fairly straight forward, if you lay out all the parts and remain organized. The growl on WOT is reminiscent of the old qudrajet carbs, I love it. There is a whistle through the filter around the 2000 rpm range. You get used to it. Overall, I am happy with the kit. It helps clean up the engine bay with less bulky items. I recommend it if you don't care about chrome flashy air tubes.

          Helpful (8)
        • October 11, 2016

          5 - KingLEe

          K N Intake

          Great part. Easy installation. Gave me f150 a little more hp and sounds awesome.

          Helpful (8)
        • August 29, 2016

          5 - UltraMagnus

          Well worth the time spent!

          item arrived in perfect condition and is complete with all parts youll need and a few extra bits. Installation took me about 2 hours but I had to clean off some corrosion. instructions were clear but make sure you 100 understand what you're doing because the instructions are in black and white combined with an indepth instruction manual/parts list that are easy to get lost in. take your time, grab a friend(s) and take care of this install. once its on youll instantly notice a better sound and a increase in performance that youll feel on wide open throttle. well worth the money spent!

          Helpful (12)

        Questions & Answers (1 answers)

        1 Top Rated Question

        i recently installed a cold air intake and someone told me i am suppose to coat the filter with oil?? if so, please tell what kind - thanks

        • The filter for this cold air intake comes pre-oiled. Once it's time to service the filter, you can purchase a recharge kit or a filter care service kit based on the manufacturer recommendations.

        Helpful (0)
        Post Your Question

        Installation & What's in the Box

        Installation Info

        What's in the Box

        • (1) Filter
        • (1) Heat Shield
        • (1) Intake Tube
        • Hardware

        Tech Specs

        Cold Air Intake Specifications
        Material:High Density Polyethylene PlasticFilter Placement:Engine Bay
        Finish:BlackComputer Tune Required:No
        Estimated Horsepower & Torque Gains:
        Estimated 4.6L HP:
        7.84hp @ 4828rpmEstimated 4.6L Torque:
        7.48lbft @ 4828rpm
         Estimated 4.6L HP:
        8.48hp @ 4775rpmEstimated 4.6L Torque:
        9.32lbft @ 4775rpm
         Estimated 4.6L HP:
        9.88hp @ 4200rpmEstimated 4.6L Torque:
        12.35lbft @ 4200rpm

        Will It Fit My F-150

        • 4.6L V8 - 04, 05, 06, 07, 08

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