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SR Performance Underdrive Pulleys - Polished (96-Mid 01 GT)

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  • Item 41129

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    Features, Video & Details

    • Free Up 10-15 Horsepower
    • Complete 3 Piece Kit
    • Durable, Lightweight Aluminum
    • Brilliant Polished Finish
    • Premium Quality Construction
    • Fits 1996-Mid 2001 GT Mustangs

    Review & Installation Video

    Review & Install Video

    Hey I’m Justin with AmericanMuscle.com, and I’m going to be breaking down the SR Performance underdrive pulleys, fitting the 4.6L V8 motor found in all 96-04 Mustangs. Engine accessories like the AC compressor, water pump and alternator can really rob your car of horsepower, a great example of how an accessory can really eat up is whenever you turn your car’s AC on, and instantly everything feels a little more sluggish. This is referred to as parasitic drag. The job of an underdrive pulley is to turn the different accessories at a different speed by using a different sized pulley, thus requiring less amount of energy from the engine to turn the accessory belt. This reduction in drag on the crank shaft will allow the engine to work more efficiently, and should equate to more power at the rear wheels. The SR Performance kit does include a brand new crank pulley, a new water pump pulley which will differ depending on your year, a new alternator pulley, and all the hardware and spacers needed for the install. All 3 pulleys have been made from lightweight aluminum and feature a nice bright polished finish, which should definitely help the appearance side of things underneath the hood. As far as the install is concerned, it really shouldn’t be all that bad, ideally, you should have a torque wrench on hand before you get started, as well as some high temp RTV sealant and a breaker bar for that crank pulley. Again this isn’t the hardest job, but you should expect to spend about 2 hours getting everything bolted up. If you should have any problems, you can always reference the detailed instructions along with pictures located on this product page. So if you’re looking to take some of the drag off your accessories, in turn freeing up some horsepower, and improving your throttle response, then you should definitely check out these pulleys from SR Performance, available right here at AmericanMuscle.com

    Free Up Horsepower. A set of SR Performance Underdrive Pulleys reduce parasitic drivetrain loss by cutting down the amount of power your accessories take up, these underdrive pulleys will free up 10-15 horsepower, without sacrificing cooling and charging functionality of your Pony.

    Premium Quality Construction. CNC-machined from lightweight aircraft grade quality aluminum alloy for strength and durability, these SR Performance pulleys feature a bright polished finish that will give your engine bay an eye-catching high performance appearance.

    Easy Installation. These SR Performance Mustang Underdrive Pulleys installs quickly and easily in under 2 hours with no modifications required.

    Application. This SR Performance 3-Piece Polished Aluminum Underdrive Pulley Kit is designed for use on 1996 to 2001 GT Mustangs equipped with the SOHC 4.6L V8 engine and the a long water pump (bowed out face). Reuses factory belt.
    Technical Note. Midway through the production run for the 2001 model year Ford changed the design of the water pump on the 4.6L engine. The older style pump produced from 1996 to mid 2001 had a longer shaft. In January of 2001 the design of the pump was changed to a shorter shaft. This necessitated a change in the design of the pump pulley.

    Click here to see pictures of the different pulley styles.

    SR Performance

    Fitment: 1996 1997 1998 1999 2000 2001 Details

    MPN# 41129

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (1) Crank Pully
    • (1) Water Pump Pully
    • (1) Alternator Pully
    • (4) Bolts
    • (3) Washers
    • (2) Spacers
    • (1) Instruction Sheet
      Hardware included:
    • None Required
    Installation Info
    Tech Specs
    Underdrive Pulley Specifications
    Year/Model: 96 to Mid 01 GT Manufacturer: SR Performance
    Material: Aluminum Finish: Polished
    Crank Pulley: Piggyback SFI Certified: No
    Will it fit my Mustang?

      Customer Photos (18) Submit Your Photo

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        Questions & Answers (24)

        5 Top Rated Questions

        What size belt do I need.

        • The SR Performance Underdrive Pulleys will reuse the factory belt.

        Helpful (7)

        What is the probleme if i dont install the harmonic balancer on sr pulley

        • The harmonic dampener/balancer must be installed when installing the SR Performance Underdrive Pulleys. If it is not, the engine will be unbalanced which will create damaging vibrations that can cause many parts in the engine to fail.

        Helpful (2)

        Can I use the stock belt size or what belt size is better

        • You would use the stock belt size with these pulleys.

        Helpful (1)

        Someone told me that because this causes the pulleys to run at a slower speed, my water pump would not be running as efficiently as it should be and cause an overheat problem... is this even remotely true or highly unlikely? Cause I’m convinced it’s not going to change the speed that drastically to cause the water pump to not put out enough..

        It says on the description of the SR Pulleys that it fits Mustang GT models from 96-2001 but then you said in the video that it fits all new edge models. So, what years is it? I have 2002 Ford Mustang Gt, would this part fit on it or would I have to make some adjustments?

        • Unfortunately, this will not work with the 02 GT Mustangs. We do have this one here that would be designed to work with your Mustang: https://www.americanmuscle.com/stack-racing-pulleys-gt.html

        Helpful (0)
        Post Your Question
        10 More Questions
        Will I have to retune the car or reset anything after I install these In my 98 gt? 1 answer
        How does this differ from the Steeda Kit? I like the fact that this kit is under 100$, but I am unsure if getting the Steeda kit with the SFI balancer attached is a better more long term decision investment for my car. Will this kit cause problems down the road? Also will the polished appearance fade over time or Rust? 1 answer
        Will it fit a Crown Victoria 1998 police interceptor? 1 answer
        We this fit on my 1996 Lincoln town car? It has the 4.6 liter. 1 answer
        does the harmonic balancer connect to the crank pulley?? 1 answer
        Hi AM. Will these pulleys fit my 1998 Mustang GT automatic? Thank you. 1 answer
        If I buy underdrive pull set it comes with harmarnic balancer 1 answer
        if i changed my harmonic balancer and if i get all the other pulleys separately will it be the same result or no 1 answer
        Will this work for an 4.6 3V 07 GT? 1 answer
        What month of the year is considerd to be mid 2001 model?? 1 answer

          Customer Reviews (61) Write a Review

          Overall Rating 4.4

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:$100-$250

          • Performance Gain 3.963636 4.0
          • Fit 4.642857 4.6



          • 4/5

            Installation Time: Afternoon

            July 06, 2019

            Fitment

            The harmonic balancer n the water pump pulley fit perfect except install instructions say to put car in gear which I did n I had e brake on n the only way I could break bolt loose on crank was to remove fan assembly n use impact. Plus the the alternator factory pulley has spacer built into the pulley so w the new pulley n separate spacer the pulley was wobbling on the shaft until I held it just rt n impacted it down. I think the pulley should have spacer already welded to pulley cause the spacer hole was exact size n the pulley hole was bigger than shaft.

            MarkT

            Year: 1998 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Afternoon

            June 25, 2019

            SR Performance Review

            Awesome product and easy to install. Anyone who has a 2001 mustang gt like me and orders the wrong one just buy the longer water pump and you are good to go. Saves time so you don't have to start a return.

            Zmeyer24

            Year: 2001 Submodel: GT

            Helpful (0)

          • 4/5

            Installation Time: Afternoon

            May 20, 2019

            Bumble Bee

            The product works well and looks great on my Gt mustang. Would recommend it to other people.

            Andre

            Year: 2000 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Afternoon

            April 02, 2019

            Underdrive

            Nice product. Good price with good quality. Happy with my purchase

            Stang420

            Year: 1999 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Less than 1 Hour

            February 26, 2019

            AWESOME!!

            Very easy to install, and gives your 94-98 mustang a very clean and sporty look under the hood. And you can feel a difference in speed and performance. Highly recommend as a simple bolt on!

            WilliamA

            Year: 1998 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Afternoon

            February 18, 2019

            Very high quality for the price

            They came in very fast and are very well made. You can feel a small gain of power.

            MarkB

            Year: 1997 Submodel: GT

            Helpful (5)

          • 4/5

            Installation Time: Afternoon

            January 26, 2019

            Not bad at all!

            Turned out nicely... small but slightly noticeable difference in power.

            SpudlyGT

            Year: 2001 Submodel: Cobra

            Helpful (2)

          • 3/5

            Installation Time: Afternoon

            January 12, 2019

            Not what i thought

            It looks nice it's just not what i expected I thought it house replace the balancer completely but it turn out I had to bolt the old ugly balancer to it other then that it good

            CodeyA

            Year: 1998 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            December 03, 2018

            Greatness

            Worked well, fit right and great improvements ! Took almost my whole afternoon due to copying exact movements from videos online but managed to finish and complete.

            Robert

            Year: 2000 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            November 22, 2018

            Performance increase

            I did notice an increase of power motor feels more responsive and more powerfull

            AbrahamL

            Year: 2000 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            October 03, 2018

            Very good!

            Good mod for my 2000 GT,I can tell a small bump of power!

            Manuel2v

            Year: 2000 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Afternoon

            August 23, 2018

            The pulleys that make your ride shine.

            I enjoy the looks it gave my engine, so when i open my hood up they can see a nicely dress up engine. A must for every car owner it worth the price. It makes your ride that much nicer.

            RolandoM

            Year: 2002 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Less than 1 Hour

            August 09, 2018

            Underdrive Pulley’s

            Great quality, was exactly what I was expecting. Delivery time was extremely quick. Easy to install

            BrendenM

            Year: 1996 Submodel: GT

            Helpful (2)

          • 4/5

            Installation Time: Afternoon

            August 05, 2018

            Pully

            Very light weight but my belt slips off of it. I’m procharged and it don’t like the smooth water pump.

            MatthewH

            Year: 1999 Submodel: GT

            Helpful (2)

          • 5/5

            July 18, 2018

            Question

            I just ordered these and they're on the way and I looked at the door jam sticker and it says march of 2001. That should fit right?

            JakeR

            Year: 2001 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Less than 1 Hour

            May 05, 2018

            Good product

            Seems nice. Minimal gain but a gain none the less. Needed a couple new pulleys anyway so this was best option. I like them

            Robert

            Year: 1999 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Afternoon

            May 02, 2018

            Fantastic upgrade

            Good upgrade for the price car does run better !!!!

            DomingoO

            Year: 2000 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Less than 1 Hour

            April 15, 2018

            1997 Gt Underdrive Pulleys

            Item is of good quality for the price. My installation went well without any problems. Recommend reading online reviews and watching youtube videos for instructions before beginning install.

            Frank

            Year: 1997 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            March 23, 2018

            Pulleys

            Fast service always by AM. Love the look that it added to the engine compartment.

            Smilie

            Year: 2000 Submodel: GT

            Helpful (3)

          • 4/5

            Installation Time: Less than 1 Hour

            February 18, 2018

            Great addition to my car

            I bought these back in September but could install them right away because my car had the short water pump and I needed the longer one. I finally got around to getting a new water pump and put them on.. it took about thirty minutes to install them had to rent a harmonic balancer puller but that was it.

            DeanB

            Year: 2001 Submodel: GT

            Helpful (4)

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