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K&N FIPK Cold Air Intake (99-04 3.8L & 3.9L V6)

83 Reviews
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  • Item #92004
  • MPN# 57-2532

  • Market Price $292.99
  • You Save 17% ($49.00)
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Product Videos Customer Photos
  • Improves Horsepower and Acceleration.
  • Filters Out Harmful Contaminants.
  • Simple Installation.
  • CARB EO Number: D-269-28 (Not Applicable to 3.9L V6s)
  • Fits 1999-2004 3.8L & 3.9L V6 Mustangs.
  • No Tune Required
Improves Horsepower. The K&N "Fuel Injection Performance Kit" (FIPK for short) Air Intake Kit completely replaces your stock 1999-2004 3.8L & 3.9L V6 Mustang's restrictive factory air box and paper filter. This FIPK Cold Air Intake features a high flow K&N filter assembly and intake tube for a noticeable increase in horsepower and acceleration, all while still providing excellent filtration.

Filters Harmful Contaminants. The supplied K&N 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.

Straight Forward Installation. With commonly available basic hand tools, the K&N FIPK CAI requires no extra modifications for a simple, straight forward installation.

Application. This K&N FIPK Cold Air Intake is specifically designed for use on 1999-2004 3.8L and 3.9L V6 Mustangs.

Note: Coupon codes cannot be applied to this product.

Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
Hardware included:
  • (2) Two #4 Hose Clamps
  • (1) One Silicone Hose
  • (1) One Hose 10mm x 10"L
  • (1) One 3/8" Vent
  • (1) One Grommet
  • (1) One Plug
  • (1) One Silicone Step Hose
  • (1) One #56 Hose Clamp
  • (1) One #48 Hose Clamp
  • (4) Four 6mm Hex Bolts
  • (4) Four 6mm Wave Washers
  • (1) One "F" Bracket
  • (2) Two 6mm Nylock Nuts
  • (4) Four1/4" Flat Washers
  • (2) Two Gaskets
  • (1) One 26"L Edge Trim
  • (2) Two 6mm Hex Bolts
  • (1) One Adapter
  • (1) One #104 Hose Clamp
Installation Info
Tech Specs
Cold Air Intake Specifications
Year/Model: 1999-2004 V6 Filter Placement: Engine Bay
Material: High Density Polyethylene Finish: Black
Manufacture: K&N Computer Tune Required: No
Will it fit my Mustang?
  • V6 - 99, 00, 01, 02, 03, 04

Most Helpful Reviews

great addition

With so many CAIs to choose from I asked my mechanic buddy and he said go with the K&N. The video instruction is for the BBK CAI, so follow the instructions that come with the kit. Easy enough to follow. ...

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Helpful (2)

Great intake

I've had this intake on my '01 V6 for a while now and it is an awesome intake. My first drive after installation I could hear a very different, almost sucking type of sound when I got on the throttle, ...

Read More
Helpful (2)

Overall Rating 4.7 out of 5 stars
Read All 83 Reviews

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9 Questions / 11 Answers

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it will need this k&n a tuner


  • This K&N Cold Air Intake does not require a tune for installation. That said, you'd obtain maximum gains by combining the CAI with a custom tune.


    Good Answer (1) (0)

Show 1 more answer Question Resolved

how much horsepower will this give my 3.8L?


  • This K&N will give gain increases of up to 10 HP and 15 TQ. Hope this helps!


    Good Answer (0) (0)

Question Resolved

Can the Filter be reused/Cleanable?


  • Yes. K N filters are cleanable.. and typically require cleaning at 25k intervals.


    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

well this fit my 2004 GT ?


Answer This Question I need this answered (0) (0)

Will this easily fit onto a 65 mm throttle body?


  • Yes, this will fit almost any throttlebody on the market with the exception of some of the larger 95mm and bigger, in most cases the inside of the throttlebody is what is changed, the outside flange stays the same diameter.


    Good Answer (2) (1)

Show 4 more answers Question Resolved

Will this CAI accommodate the Poweraid Torque Spacer? I have had issues clearing the strut mount with my current intake.


  • The K&N FIPK Cold Air Intake (99-04 3.8L & 3.9L V6) will accommodate the Airaid Poweraid Throttle Body Spacer (99-01 V6) part number 52215. As long as you have a factory throttle body this spacer will match up with any intake.


    Good Answer (0) (0)

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Customer Reviews (83) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Less than 1 Hour

Installation Cost:0-$100

  • Performance Gain 4.090909 4.1
  • Fit 4.30303 4.3

  • 4/5

    Installation Time: Less than 1 Hour

    August 14, 2014

    Mustang 04 V6 K&N Air Intake

    makes a lot of difference, definitively gain HP... easy to install


    Year: 2004 Submodel: V6 montreal, canada

    Helpful (1) (0)

  • 5/5

    February 13, 2010

    Great intake

    I've had this intake on my '01 V6 for a while now and it is an awesome intake. My first drive after installation I could hear a very different, almost sucking type of sound when I got on the throttle, very deep and loud. The extra power was noticeable as well, not a gigantic amount, but noticeable. I also agree with Dakota's review: at times the car will act herky jerky when I cruise along at certain low speeds. It seems to happen the most in 4th gear (manual) around 30 to 38 mph. It doesn't seem to happen all the time, but enough that it can get annoying. That is my only drawback to this intake. Other than that, I highly recommend the K&N system.

    Daniel C

    Year: 2001 Submodel: V6

    Helpful (2) (0)

  • 5/5

    April 28, 2009

    great addition

    With so many CAIs to choose from I asked my mechanic buddy and he said go with the K&N. The video instruction is for the BBK CAI, so follow the instructions that come with the kit. Easy enough to follow. The CAI gave a notable increase with my magnaflow set up and of course the aggressive hiss noise.

    Alan L

    Helpful (2) (0)

  • 5/5

    February 27, 2010

    Worth it

    A cold air intake is a easy way to get a decent amount of horsepower, but there is far too many to choose from. I used to have BBK and it was alright. After putting this on you can tell where your money goes. K&N is the best. Gave me more response and slightly more pull.


    Helpful (34) (1)

  • 5/5

    June 17, 2010

    Mustang 6

    Great Product, the filter K@N supplies is monstrous and the sound is alot better and throatier in the higher revs.which is what I really wanted out of the intake. Not quite a V8 but closer. To notice any power gains you really have to get a tune trust me


    Helpful (17) (0)

  • 4/5

    January 25, 2010

    Well Worth It

    I have a 40th Aniv. Mustang V6, so naturally I wanted a V8 and figured this would help me on my way to getting close. It deff added a big increase of horsepower and my car sounds much deeper. The whistle of course is always a nice touch too. Only problem i have with it is that it makes the car really jumpy at times when you let off the gas and stay at an inbetween speed. But overall well worth it and a great part to choose. Thanks AM.


    Helpful (13) (0)

  • 5/5

    April 26, 2010

    best intake hands down

    after about a month of trying to decide which intake to go with chose k&n and i no i made the best choice adds on a few horses and gives it a bit more of a growl especially if you have and dual exh.....if your undecided go with this product!!


    Helpful (12) (2)

  • 4/5

    July 25, 2009

    High quality intake

    Wow, how cool! Fits my 2001 V6 like a glove. I noticed a slight gain in power, nothing too big. You can hear a sucking sound inside the car when you step on the gas, but the sound is nothing to rave about. BUT, hard revs in neutral produce a very cool sound, similar to a turbo. A little expensive, but you pay for a good product. K&N says it's a 6.something HP gain. So four stars for price/HP ratio.


    Year: 2001 Submodel: V6

    Helpful (5) (0)

  • 5/5

    March 18, 2011

    K&N CAI for 99-04 V6

    I've had the CAI on my 2004 3.9L V6 since Sept 2009. I noticed an immediant difference in response, sound, and efficency. I went from 27mpg to 29mpg.

    Steven T.

    Year: 2004 Submodel: V6

    Helpful (6) (1)

  • 5/5

    March 07, 2009

    A MUST!!

    This K&N is a must for any car! It makes the car breathe so much better. Very easy to install, anyone can do it and it fit like a glove.


    Helpful (3) (0)

  • 5/5

    November 30, 2010

    worth the money

    i took a while to decide on and intake, but ended up going for the K&N. so glad i did, when you make quick shifts and floor it at high revs you can really hear it suck in the cold air in and whistle. Install was relatively easy, took me 2 hours but i didn't want to mess anything up. Don't waste your time with the others, just go for the best.


    Helpful (4) (1)

  • 5/5

    September 14, 2009

    It works

    Bought this for my 04 Mustang. I run the 3.9L/238, not the 3.8L you comminly see. Took bout an hour and ahalf. Definately see a difference. Enigine sounds more like a v-8 and will get up and go. The only thing is this is built with tight tollerances.


    Year: 2004

    Helpful (5) (2)

  • 4/5

    Installation Time: Afternoon

    May 07, 2012

    Not CARB Legal for 3.9L

    I had to remove mine after trying to get it to pass CA smog. The guy insisted that even though the 3.8L and 3.9L are almost identical, and they have the same part number stock exhaust manifold part numbers, that because K&N did not certify it for the 3.9L it was not legal. CA Stangs BE FOREWARNED. Other than that, it fit well, was easy to install and produced descent gains.


    Year: 2004 Submodel: V6 San Jose, CA, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    July 30, 2012

    Easy for the money

    If you're looking for a little more boost this is a decent way to go. Fairly easy to install and could notice a small increase in power immediately. Great buy!


    Year: 2003 Submodel: V6 Denver, CO

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    April 30, 2012

    K&N CAI

    This puppy will kick some bumper along with the BBK 6mm throttle ....Booom,Feel like im the king of the road.


    Year: 2004 Submodel: V6 Los Angels

    Helpful (1) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    March 11, 2012

    K&N, enough said

    took about 45 min to install, the sound under the hood and performance had a great change im happy with my purchase thanks AM!!


    Year: 2004 Submodel: V6 Eagle Pass,Tx

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    March 02, 2012

    Great product!

    First off let me just say wow! I bought this along with the 65mm throttle body and installed them at the same time. Together it took me about 2 hours to intsall. Getting the k&n pipe in was a bit diffucult for me, i had to use some strength to get in on right! i was afraid i was going to break it from pushing it so hard. It seem as if one of the pipes were directly in the way. The pipe went along next to the strut tower and i feel that if that pipe wasnt there it would have been a 5 star fit. I noticed the difference right away! When i get the rpm's around 2k theres a whistle then over that you can just hear it sucking in the air feircely! First mods for me, Worth it!


    Year: 2004 Submodel: V6 Dearborn, MI

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    October 18, 2011

    Great Intake

    This is a great intake and is well worth the money installation was easy and took less than an hour i also installed this with the bbk short throttle which is also a great product i recomend this to anyone who wants to mod there v6 mustang a must have!!!!!!!!!!!!!!!!!!!!!


    Year: 2003 Submodel: V6 north carolina

    Helpful (1) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    September 20, 2011

    Great Product, But Too Pricey

    Great Product w/Easy Fit Makes A Nice Increase In Power Especially In My Automatic w/ A Tune, Can Easily Beat Any Honda Trying To Race w/The Same Bolt Ons...Recommend Purchasing A Tuner Before Buying Any Bolt Ons, But Overall Good Product, My Car Runs Good And Fast, But The Price Should Be Cheaper.


    Year: 2003 Submodel: V6

    Helpful (1) (0)

  • 5/5

    June 26, 2011

    K & N is king

    Loved this product. As soon as it was installed i gained 3-4mpg on highway (26mpg avg) and about 1mpg in city(18mpg avg). Do not install in the dead of winter though. Rubber seal needs to be warm to fit over the intake tube. Took an hour just to fit that and about 1 hour for the rest of the install.


    Year: 1999 Submodel: V6

    Helpful (1) (0)

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