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Steeda Billet Charge Motion Control Plates (05-08 GT)

Market Price $313.99 You Save 11% ($34.04)
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  • Item 16162
  • MPN# 555-3125

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    Features & Details

    • Gain 10+ HP
    • Improves Torque
    • More Midrange & Upper Rpm Power
    • CNC Machined Billet Aluminum
    • Installs Using Hand Tools
    • Fits 05-08 Mustang GT and 08 Bullitt
    Gain 10+ HP. Replace your restrictive factory charge motion control plates with Steeda's free-flowing plates and enjoy more power and torque. These high performance plates add horsepower and torque in the mid to upper RPM ranges without sacrificing low end torque for the kind of tire-frying power you can feel. Peak gains of up to 10 horsepower have been seen on naturally aspirated Mustangs, and more power is possible from supercharged engines.

    Designed to Perform. As used on Steeda's Q335 Mustang, these plates are 0.070 thicker than the factory plates and are a better port match to the intake manifold and cylinder heads than your OE plates to untap hidden horsepower. They also delete the factory butterfly flow control to reduce turbulence and increase airflow - and as everyone knows, more airflow equals more power.

    Billet Aluminum. These premium quality plates are CNC machined for precision out of aircraft-quality 6061-T6 billet aluminum so they won't weigh you down.

    Application. The Steeda Billet Motion Control Charge Plates are designed for the 2005 to 2008 Mustang GT and 2008 Bullitt with the 4.6L three valve V8 engine. These plates will require computer recalibration - we recommend a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

    Note: Coupon codes cannot be applied to this product.

    Note: As of the 2009 model year, Ford molded the charge motion plates into the stock intake manifold. So they are not changeable.

    Fitment: 2005 2006 2007 2008 Details

    What's in the Box
    • (2) Control plates
    Installation Info
    Will it fit my Mustang?
    • Bullitt - 08
    • GT - 05, 06, 07, 08

    Does not fit 2009 models.

    People Who Bought This Item Also Bought

    Most Helpful Reviews

    A Must-Have!

    This is an absolutely necessary step. The restriction is removed! You should see the stock butterfly valve assembly with actuator motor... GOODBYE! These really made a difference. Of course, I had Bama ...

    Read More
    Helpful (11)

    Easy install, decent gains, tune required!

    These are made out of solid billet aluminum and add an extra 20 grams over the standard cast pieces with the butterfly valves and linkages. They are designed to fit 2005-2008 Mustang GT with the 4.6L 3V ...

    Read More
    Helpful (10)

    Overall Rating 4.7 out of 5 stars
    Read All 60 Reviews

    Customer Photos (14) Submit Your Photo

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    10 Questions / 8 Answers

    Ask a Question

    Will this throw an engine code? I'm wondering if it will make my engine light come on and also will it work with the ford racing manifold or does that manifold have it molded in?


    • the frpp intake does the same thing as this and you will see almost the same power increase. the frpp intake has a little more power over 5500 rpm, but not much. this part will save you alot of money and you wont be disappointed with your increase in power. i would only buy the frpp intake because it looks good and people love it at car shows. but to answer your question, you dont need these with your frpp intake, it does the same thing.


    Show 2 more answers Helpful (4)



    • The Charge Motion Control Plates will yield a check engine code and will require an ecu calibration for proper functionality.


    Helpful (1)

    Would you use these plates with a Ford Racing intake manifold.


    • The Ford Performance High Performance Intake Manifold will not require plates such as the Steeda Billet Charge Motion Control Plates, as these are built into the manifold.

      Rob D

    Helpful (0)

    Can these plates fit into a 2009 gt?


    • As of 2009, Ford molded the charge motion plates into the stock intake manifold. So they are not changeable.


    Helpful (0)

    Can I install these without a tune and have the car driveable, getting a tune a little later?


    • The Steeda Billet Charge Motion Control Plates require a tune. We strongly advise against using them without a tune for any period of time.


    Helpful (0)

    I have an 08 GT/CS with K N CAI, GMS 62MM TB, Flowmaster Axle Back Exhaust, UD pulleys, 3.73 rear am running a BAMA 91r tune. I am looking at purchasing these. Any other recommendations while I have the intake off? Thanks,


    • The Steeda Billet Charge Motion Control Plates do not need any other things done while the intake is off. please keep in mind, a new tune will be required when deleting the charge motion control valves with this component.

      Rob D

    Helpful (0)

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    Customer Reviews (60) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Performance Gain 4.296296 4.3
    • Fit 4.944445 4.9

    • 5/5

      January 03, 2011

      A Must-Have!

      This is an absolutely necessary step. The restriction is removed! You should see the stock butterfly valve assembly with actuator motor... GOODBYE! These really made a difference. Of course, I had Bama tunes send me a new tune and loaded it while my mechanic was putting these on. The results were pure rock and roll. These are as important as CAI, TB, headers, and exhaust no doubt. Free airflow is key! Highly Recommended.


      Helpful (11)

    • 5/5

      Installation Time: Full Day

      January 19, 2013

      Easy install, decent gains, tune required!

      These are made out of solid billet aluminum and add an extra 20 grams over the standard cast pieces with the butterfly valves and linkages. They are designed to fit 2005-2008 Mustang GT with the 4.6L 3V V8 engine. 2009-2010 Mustang GT intakes have the valves built into the intake manifold and will require a different product (delete plugs). A new engine tune/calibration is required because the IMRC/CMCV has to be shut off, and a few other things need to be done to maximize the power gains with these plates. After doing extensive research on these plates, I have found that with a good tune the plates alone will net approximately 10 rwhp gains without any loss of low-end torque/power. There are a lot of discussions going on about the potential for losing low end power, but based on discussions with tuners that I know and reading dyno graphs, the power gains are only positive throughout the engine operating range. The CMCV/IMRC is apparently used only for emissions control, as the new 5.0L DOHC V8 used in the 2011-up Mustang GT does not use any type of IMRC/CMCV and instead has variable cam timing for intake and exhaust valves that most likely do all of the emissions reduction. The overall installation took about 3-4 hours, mainly because I took it very slowly and had numerous meal and bathroom breaks. My 07 Mustang GT also had about 12k miles, so the intake manifold gaskets (the green silicone/Viton gaskets attached to the valve plates) got really stuck to the cylinder heads and required some additional force to lift out. There was also a lot of dirt and grit to clean out of the engine due. The LH plate is for the driver’s side, and the RH plate is for the passenger side. I followed TacoBill’s installation guide, which has the best photographs of any online guide I have found. The fuel line does not have to be disconnected, and the air intake tube does not have to be removed either. The air intake tube at the throttle body has to be disconnected though. Also, the vacuum tube on top of the PCV tube simply requires the white tab to be fully depressed to disengage the lock (the tube above the one with green rotating lock tabs). After installing the plates and my new tune, I did not see any check engine lights or RPM flare up after a cold start. It started up like normal and idled very smoothly. I have not taken it on the road for a test because of the weather (winter in Michigan) but it did not exhibit any problems. Overall: 5 out of 5 stars, a great modification if you wish to stay naturally aspirated or utilize the stock intake manifold. I originally wanted to buy the Ford Racing intake manifold, but every dyno test of that intake showed significant decrease in power and torque below 5000 RPM with all of the gains well above 5000 RPM. Even with the 3 Stage CNC heads and Hot Rod cams, the Ford Racing intake manifold only showed gains at the 6000-7000 RPM range, and the stock intake manifold provided the largest area under the power and torque curves in all of the scenarios.


      Year: 2007 Submodel: GT Michigan, USA

      Helpful (10)

    • 5/5

      May 25, 2011

      Love it

      This the 3rd mod I have done to the car. At first I was worried about installing this myself but trust me it was so easy. There was nothing hard about this at all. I also had a Baka tune to go with this. From first to 5th I could deff. Tell the car pulled harder and all around breathed better. Again do not worry about doing this yourself


      Year: 2007 Submodel: GT

      Helpful (10)

    • 5/5

      April 05, 2010

      Very Happy!!

      After recieving my plates I coundn't wait to install them. It only took about an hour and the results were more then I had hoped for. These plates and American Muscle are number 1 to me!

      James Frakes

      Helpful (10)

    • 5/5

      May 20, 2011

      Good upgrade

      Nice upgrade, very easy install. Took about 1 hour to install. I noticed it pulls harder in the midrange. No waiting for the butterflies to open up. Smoother pull. My car is auto.

      Jose rueds

      Year: 2006 Submodel: GT

      Helpful (7)

    • 5/5

      Installation Time: Afternoon

      February 04, 2013

      Fast and easy install :)

      Took about 1 hour to install. Got to see the need for the oil separator while installing this... all that oil going back into the engine... does not look too great. Very easy install for the plates! :)


      Year: 2006 Submodel: GT

      Helpful (6)

    • 4/5

      Installation Time: Less than 1 Hour

      February 25, 2012

      Noticable gain

      I keep seeing a bunch of post of "omg it really made my stang come to life!" to be honest with 4.10's and other bolt ons its hard to see that much of a difference. the install was easy peezy, the throttle response i will say is alot better. get this product if you're interested.


      Year: 2005 Submodel: GT Albuquerque, NM

      Helpful (6)

    • 4/5

      Installation Time: Shop Install

      December 08, 2011

      Great Product

      I got these installed with the Under-drive pullies, Ford hot rod cams and a tune and what a difference!! I laid down 332hp and 322 tq. This car is a whole new beast and i can tell the car adapted to the plates with the amount of high end pull it gives, it just screams to 6500 RPM and i can tell the open valves have helped. Thanks American Muscle for all the parts and fast service.


      Year: 2007 Submodel: GT Everett, WA

      Helpful (6)

    • 5/5

      August 08, 2010

      its great

      easy to install and made a great leap in performance

      bill brian parsons

      Helpful (6)

    • 4/5

      Installation Time: Afternoon

      May 13, 2013


      The directions are straight forward. You can take off the fuel rail and injectors as one unit without disconnecting the main fuel line (so you don't need the special tool). The power gains are slight, but the real benefit is that power is instant... there's no more of that 1 second delay waiting for baffles to open up. Now I can just floor it and go.


      Year: 2006 Submodel: GT MN

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      March 28, 2012

      Best modification yet!

      First thing you notice is it is a shame that these are hidden. They are a beautiful piece of machine work! Installation is straight forward but don't forget to disconnect the vacum line for the brake booster. No other surprises. I completely removed the actuator motor since my Bama tune deleted it. 5 pounds of dead weight gone! Throttle response is much quicker both on and off. Bottom it!


      Year: 2007 Submodel: GT Bellingham, WA

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      January 27, 2012

      air flow

      Well these helped greatly and are a must with a turbo application. I only got 481 and 500 trq before these and after I got 687 rwhp and 760 tq. Now I know on a stock motor the gains aren't that big but on my turbo setup the stock control valves weren't opening correctly and not letting boost in. So best money spent for me. And they look way better than stock.


      Year: 2006 Submodel: GT virginia

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      January 18, 2012

      Pressing the gas never felt better

      This upgrade really made my pony jump. I have the custom tune, with a gms TB, a magnapack catback, CAI, and now these! 1st gear.. you lose traction very easily now. The higher RPMS, the acceleration is amazing. This is a must have if you're looking for the next step.


      Year: 2005 Submodel: GT New Jersey

      Helpful (4)

    • 5/5

      August 01, 2016

      Steeda Billet Charge Motion Control Plates

      Absolutely love the plates. I really do feel a little bit more horsepower.. They are great to truly maximize the amount of air for your pony can take in!


      Year: 2005 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      July 23, 2013

      I would say it is worth it.

      It is hard for me to say how much you actually gain from these. I have added a cold air intake, throttle body, tune, exhaust, headers, under drive pulleys, etc..... in the last month.... Worth it to eliminate the oil covered valves that do obstruct flow .... I would recommend them and guess at 10 or less HP gained, I was looking more for long term when I add a supercharger.


      Year: 2007 Submodel: GT Pittsburgh Pa

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 19, 2012

      Free air

      These are very high quality for the buck. Get rid of the motion control valves and get even more power. I installed myself with standard tools. It took me around 6 hours and I really took my time with it. The directions are not that great so make sure you know the car or have a shop manual handy to make sure you get everything detached before you pull the intake off. It's hard to say how much power this adds but it can't hurt. With long tubes, CAI, underdrives, under drive pulleys, 93 Bama tune, GT500 TB and got 347 RWHP on they dyno.


      Year: 2008 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      April 06, 2012

      Easy install nice feel

      The part quality is excellent. Install time was around 90 mins with only a few tools. The car had a feeling of accelerating easier and faster with less gas pedal. This were installed after my long tubes and mid pipe along with a bama tune. Totally worth it.


      Year: 2008 Submodel: Bullitt Richmond,tx

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      September 27, 2017

      Trade Off

      This will be a long but detailed review. Installed on an 06 GT manual that is daily driven and used for auto x and track days. List of parts include JLT series 3, 62mm tb, Hot Rod cams, shorties, off-road x-pipe, 4.10 gears, 93 race tune. I wanted to get plenty of seat time before reviewing and this is what I've experienced. To begin these are pieces of art, beautifully machined. I followed the customer submitted install guide and had no problems. When I removed the stock butterfly valves I was shocked at the amount of carbon build up and oil residue in the intake track in only 27000 mi. That prompted me to also order an air-oil separator. I feel it is a must. The seat of the pants feel is not huge but it is noticeable. On my car I no longer have that light switch feel when the stock valves opened, it's more linear. It pulls strong from mid to upper rpm which really comes into play at the track. Now for the trade-off. Fuel mileage. Before mileage in city was 18 to 20 mpg, highway 24 to 26 mpg. City mileage now 14 to 16, highway 20 to 22. Where it really suffers is in start and stop driving and if there's a lot of idle time.That's where the stock valves were beneficial. The exhaust smell is also more noticeable at idle. None of this matters to me as I was looking for the max performance from my current set-up and I feel have it, especially on the track. Driveability has not suffered. In closing I would just suggest you ask yourself what you really want out of your car and know that there is a trade off. With that being said, I am satisfied with this purchase and would recommend


      Year: 2006 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      March 22, 2015

      Easy Install

      These things were a breeze to install. Instructions were clear and came with pictures. I had a new tune ready from Bama, took the car out for a spin and you can really feel a change in 1st and 2nd gear. Two things to been on the look out for: #1 - Ensure the area around the stock CMCP/ Intake manifold are clear of any dirt/debris. With the intake off, it is a straight shot into the engine. #2 Be CAREFUL when pulling off the fuel rails. Some folks said they came off easy; others said it took everything they had to get them off. My drivers side came off fine. Passenger side was a little stubborn. One end popped out and the other end stayed stuck. End result, I ended bending an injector port on the fuel rail. Overall I am extremely pleased with this product. Fast shipping by AM and great product by Steeda.


      Year: 2005 Submodel: GT Russellville, AR

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      July 23, 2014

      Steeda CMCP Delete

      This is a must to do as the butterfly valves in the intake runners even at full throttle are restrictive. Right off the bat you can feel it in the seat of your pants. One thing in the directions YOU DO NOT HAVE TO DISCONNECT YOUR FUEL RAILS. Just flip the whole fuel rails with injectors on them over onto the driver side just place a towel as some gas will leak out.


      Year: 2005 Submodel: GT Mililani, HI, USA

      Helpful (2)

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