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Ford Performance 90mm Mass Air Meter / Sensor (96-04 4.6L)

Market Price $143.99 You Save 13% ($18.00)
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  • Item 50099
  • MPN# M-12579-L54

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    Features, Video & Details

    • Large 90mm Diameter
    • Flows More Air
    • 4 Pin Connection
    • Great for Custom Tune Applications
    • Fits 1996-2004 GT, Cobra, and Mach 1 Mustangs

    Review & Installation Video

    Review & Install Video

    Ford Performance's 90-millimeter Mass Air Meter is a great option for the '96 through to '04 two-valve owners out there that have more or less maxed out their current air intake setup with plenty of other air and exhaust mods like a cold air, intake manifold, throttle body, and headers. And, in my humble opinion, its huge MAF housing upgrade is really geared for forced induction applications. But in terms of the installation here, guys, this is getting an easy one out of three wrenches in the difficulty meter here, less than an hour of work with basic hand tools as it's merely just gonna be replacing your existing setup. So what exactly is this stack? Well, at face value, guys, it's a mass air meter, nothing nuts about that, and it's gonna go in between your air filter and your throttle body. But why would you want or, more importantly, need a bigger mass sensor? Well, the word "need" is key here, and, generally speaking, the stock MAF unit can only handle so much air. Now, when you've bought every other air and exhaust bolt-on available, or you're going forced induction, you're more or less adding too much airflow for the stock MAF unit, and that's where this upgrade comes in. And not only is airflow something that's key here, but having the right amount of fuel is another variable that you really need to pay close attention to. Your injectors will come into play here along with needing a tune, and, with that said, a tune is also really important here when installing this MAF unit, and this is something that we see our customers using with cars that are already being dyno-tuned. Now, either way, if you're the owner that's maxed out your naturally aspirated mods or you're looking into a turbo or a blower, this is going to be a must-have mod in order to avoid having your factory MAF pegged because of that increased flow. So the requirements aside, guys, you're looking at a quality Ford Performance takeoff here, and now this same MAF sensor is found on the blown SVT Lightning, and it's made from a rugged injection-molded body, which is gonna help reduce heat soak, which can be common on heavily modded or blown cars. Now, speaking of factory modification, this will need some wiring adjustments on the '02 through '04 GTs, the Machs, and the '03, '04 Cobra. Now, these models have the intake air temp sensor built right into the stock MAF. While this unit does not add an external IAT, it does need to be added so your ECU can look at the temperature to control timing accurately. But in terms of the pricing here, guys, expect to be sweated just about 130 bucks for this unit, and that is gonna be one of the most affordable MAF meters in this diameter at the time of shooting this video. And it's a small price to pay considering you'd likely spend a ton of money under the hood of your car with this helping you get that extra bit of power when it counts. Now, installation-wise, you're looking at a very straightforward one out of three wrenches on the difficulty meter here out of 30 minutes to an hour job. You will start with disconnecting the wiring harness for the factory sensor. You're gonna use the ratchet and socket set to unbolt the housing from your setup. Now, from there, swap over to the other side and use a flathead to unclamp the housing from the coupler. Now, you then wanna remove that completely and then swap it out with your Ford Performance 90-millimeter option. Replace the bolts, plug in your harness, tighten your couplers, and you're ready to go. This set's gonna wrap up my quick review and breakdown of Ford Performance's 90-millimeter Mass Air Meter/Sensor fitting the 1996 through 2004 4.6-liter Mustang that can be found right here at

    Flows More Air. AmericanMuscle now offers the Ford Racing 90mm Lightning Mass Air Meter. The Ford Racing 90MM Mass Air Meter is great for modified and custom tuned applications where the stock mass air meter "pegs" due to increased air flow.

    Application. This 90mm MAF from Ford Racing is a direct bolt-on replacement for 2000-2004 Ford SVT Lightning and will also fit the 1996-2004 GT, Cobra, and Mach 1 Mustangs, but will require custom tuning for proper results. Features:
    • 90MM MAF
    • Fits 1996-2004 GT, Cobra, and Mach 1
    • 4 Pin Connection
    • Requires a custom tune
    Technical Note. This MAF sensor will need some wiring adjustments for it to work properly on the 2002-2004 GT, Mach 1 and SVT Cobra Mustangs. These models have the Intake Air Temp (IAT) sensor built into their stock MAF while this Lightning MAF does not. An external IAT sensor needs to added into the intake tubing.

    Fitment: 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

    What's in the Box
    • (1) Mass Air Meter
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Bullitt - 01
    • Cobra - 96, 97, 98, 99, 01, 03, 04
    • GT - 96, 97, 98, 99, 00, 01, 02, 03, 04
    • Mach 1 - 03, 04

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    11 Questions / 6 Answers

    Ask a Question

    I need an adapter for the air filter side and can not seem to find one....... Any suggestions


    • The only adapter we offer is the SCT 2900 Big Air MAF Cone Filter Adapter. This adapter only works with the cone style filter BA-2600 or BA-3000.


    Helpful (0)

    would i be able to program this sensor with a bama tuner?


    • The Ford Performance 90mm Mass Air Meter / Sensor requires a custom dyno tune as the tune require calibrations from live data. Due to this process, Bama Performance is unable to tune for this component, we apologize.


    Helpful (0)

    I have a 2004 mustang gt, 75mm BBK TB, BBK CAI. I am throwing a check engine light for intake air temp and the shop said that my IAT was built into the MAF and that my mass air flow sensor was actually bad and needed to be replaced. Will this have the IAT built in or will a need a separate IAT sensor? Yalls description is a little confusing.


    • I do apologize about that, the Ford Performance 90mm Mass Air Meter / Sensor is meant for racing applications for as much air flow as possible. I do not believe this item will solve the problem you are facing. I would recommend one of the BBK Mass Air Meters, which one you go with will depend on what size injectors you plan on using.


    Helpful (0)

    Im looking to buy a bigger MAF and injectors I like the ford racing MAF and the ford racing EV6 24lb injectors I was also wondering if the ford racing mass air meter comes with a sensor or is it just a housing The only upgrades I have done to my 98 GT is BBK pulleys msd coils BBK x-pipe BBK 78mm TB plenum and CAI Are these upgrades enough to upgrade the injectors and MAF


    • The Ford Performance 90mm Mass Air Meter / Sensor includes the housing and the sensor. Since the Mass Air Meter / Sensor requires a tune, this will essentially work with any modifications after calibration.


    Helpful (0)

    Im looking to purchase this item Just wanted to check and make sure the mass air flow housing comes with the ford racing sensor


    • The Ford Performance 90mm Mass Air Meter / Sensor comes with the sensor and the housing as a package.


    Helpful (0)

    Will this item work well with my setup? I have a 2000 gt with a new PI 4.6 engine. BBK high flow fuel rails, ford racing intake manifold, trickflow 75mm throttle body, and CAI, 30lb injectors. bama tune. I believe that I am currently maxing out the stock MAF, and am looking for something to correct that situation.


    • yes


    Helpful (0)

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    Customer Reviews (29) Write a Review

    Overall Rating 4.5

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Performance Gain 4.095238 4.1
    • Fit 4.190476 4.2

    • 5/5

      October 14, 2010

      90mm lightning meter

      Make sure to get 39lb/42lb injectors with this product otherwise it's worthless to buy, you should also get the throttle body upgraded too, I had a performance shop install it & Dynotuned my car, no major gains maybe 4-5hp

      Paul Kayal

      Helpful (24)

    • 5/5

      August 25, 2009


      This combined with the BBK Twin 65mm Throttle Body gave my 98 Cobra SOOOO much more low end torque!! This definitely lets the engine suck in a whole lot more air!


      Year: 1998

      Helpful (10)

    • 4/5

      Installation Time: Less than 1 Hour

      September 15, 2011

      02 - 04

      I didn't know before purchasing but this MAF does not have a air intake temp sensor, caused my car to run rich and various other annoying problems. Make sure you find said sensor male and female part to make this product help your car run properly


      Year: 2002 Submodel: GT TX

      Helpful (8)

    • 5/5

      April 07, 2010


      I installed this MAF with the BBK 65mm throttle body on my 2001 Bullitt, the low end is awesome. Much better throttle response too.


      Year: 2001

      Helpful (8)

    • 5/5

      July 16, 2011

      Does not fit

      This size mass air meter does not fit on the JL cold air intake for the 2001 Bullitt, but there's no disclaimer that says that.


      Year: 2001 Submodel: Bullitt

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      June 10, 2016

      ford racing 90mm maf.

      best bang for the buck out there in an upgraded maf, as you increase performance, pegging your maf at 5 volts, the motor will go lean. And that’s bad emmm-k. Generally speaking the stock maf is good to about 300 hp, the 80mm maf 350-375, ish and the 90mm lighting maf will peg around 450 hp. Its best to size your maf a bit larger than intended hp, but not too much, as you give up resolution, you still only have a 5 volt max to the ecu. NOTE, Any Ford MAF as well as the SCT MAFs are NOT calibrated for any injector size. The injector size is set in the ECU. I have found, as well as other smarter than me, that this ford racing 90mm maf will make a great smooth transitions with 4" air cleaners and ram air or cold air intakes such as jlt, and the bbk 79mm throttle body/pethum it will neck down to 3" increasing velocity into the intake manifold. this set up has been used to good effect in many motors. Absolutely requires a tune, mass air transfer function is about the most important part of the tune.


      Year: 2001 Submodel: GT

      Helpful (4)

    • 5/5

      March 31, 2011

      Ford Racing 90mm

      Easy install...I did it in the parking lot of a.s.a.p performance 15 minutes...Only thing they forgot to tell me about is that you need a air temp sensor to install also...


      Year: 2002 Submodel: GT

      Helpful (4)

    • 5/5

      March 11, 2011

      Great MAF!

      Great product, excellent customer service and super fast shipping - what more could a gear head ask for? Thanks AM!


      Year: 1997 Submodel: Cobra

      Helpful (4)

    • 4/5

      September 01, 2016

      Great price!

      Fits perfect and looks stock. I installed the meter in less then a hour. This 90mm Mass Air Meter/Sensor does not come with gasket where you mount to the air box. You will also need to purchase a 4" coupling to 3.5" if you have a Airaid cool air intake. Over all great price and a great product.


      Year: 2000 Submodel: GT

      Helpful (3)

    • 5/5

      June 06, 2016

      90mm MAF

      Perfect fit for my 98 cobra\application! I was able to achieve the power I was lookibg for with this MAF!


      Year: 1998 Submodel: Cobra

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      October 07, 2015


      My 1999 mustang gt is super charged and this Ford Racing 90mm Mass Air Meter truly made an AWESOME difference especially on the low end RPM,s. This monster is amazing out of the box!!!!!!!!!!!!, Its a but early to tell but I think I have seen a bit better gas mileage as well.


      Year: 1999 Submodel: GT michigan

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      July 17, 2015


      I really don't know where to begin. I have a mildly modded 00' GT ALL BOLTONS comp cams 270's and 125 shot of nitrous. After the install the response of the thottle was very much improved and noticeable. Although tuned by BAMA, my rpm's were set at 770 so my car would drop too low in rpm's to where it would shut off when idling. This was ok because I know my car and am familiar with the SCT tuner so I simply reset my rpm's to 900 right where they need to be in order to keep the car at a nice steady idle. Tune is great and the 90 mm FR maf is truly worth every penny. Car makes 430 HP / 414 toque and putting down 355 RWHP to the wheels on a 125 shot of nitrous. The car now runs as it was meant to do. Very pleased with this lighting maf and I recommend it to any 4.6L owner who's modified their car.


      Year: 2000 Submodel: GT calgary, AB

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      February 28, 2013


      Installed this along side an SR performance CAI. I should have read a little more but due to the size of this MAF meter it was not designed for my CAI. I was however able to manipulate the CAI connector hose to fit onto the clamp side of the MAF meter allowing it to connect. I cannot comment on the performance side accurately as I need a tune to truly get the benefit of the larger MAF meter. All my parts were stock so there is some slight increase in performance but I can only say that this may be from installing new parts, again I need a tune. Overall this thing is huge and definately lets a lot more air through, but the gain in volume is restricted by the diameter of the CAI tubing to the throttle body.


      Year: 2000 Submodel: GT Martin, Ga

      Helpful (3)

    • 2/5

      Installation Time: Afternoon

      December 28, 2016

      Not a direct fit for 1999 cobra

      I have a 1999 cobra with a stock air box connected to my stock throttle body. This MAF does not slide into the existing tube going to the throttle body. Actually it is the same size diameter and not larger like it should be to slip over the tube going to the throttle body. I had to buy a larger rubber adaptor to slip over both and then tighten it down with clamps.


      Year: 1999 Submodel: Cobra

      Helpful (2)

    • 5/5

      August 18, 2016

      Mass air flow

      Awesome product for my 02 saleen mustang runs stronger!


      Year: 2002 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      April 30, 2014

      Esily adaptable to my Fox

      If you adapt this to your fox, you no longer have to match injectors. Another must have for my RPM II intake swap


      Year: 1992 Submodel: Other Philly

      Helpful (2)

    • 4/5

      Installation Time: Less than 1 Hour

      May 25, 2012

      90 mm lightning MAF

      it was a bit of a pain to install, needed a bigger sleeve to attach the intake to it. but overall good quality upgrade for your stang I don't think this improves overall horsepower but I definitely feel a quick response from the throttle, I'd equate this gain similar to when I first installed my new throttle body. so I'm pleased.


      Year: 2001 Submodel: GT Indianapolis, IN, USA

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      September 12, 2017

      90 mm maf

      Great product solved idle issue! Drives great with custom tune. Thx am!


      Year: 2003 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 26, 2016

      Great Air Flow

      Works just as described, great air flow, looks great!


      Year: 2002 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      August 18, 2014

      90mm Mass Air Flow Meter

      This took about 15 min to install with basic tools. I did have it tuned just with my handheld. I could tell the car was sucking a lot more air. The Rpms were going up faster than with the factory mass air meter. Now for the overall horsepower gain I don't really know. I could tell a difference in the torque more than anything. But like I said it was a good purchase. If your car needs more air. This is a great way to do it.


      Year: 1998 Submodel: GT IL

      Helpful (1)

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