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Steeda Underdrive Pulleys (05-10 GT)

AmericanMuscle no longer carries the Steeda Underdrive Pulleys (05-10 GT). Please check out 2005-2009 Mustang Underdrive Pulleys for an updated selection.

Features & Details

  • Gain Up to 10HP
  • Improves Fuel Economy
  • SFI Certified
  • Industry Leading Design
  • Fits 05-10 Mustang GT
Gain 10HP. You might not know it, but your belt-driven accessories steal up to 10HP. Put those ponies back under your right foot with Steeda's underdrive pulleys.

Innovative Design. Unlike any other underdrive pulley, Steeda used their unique partnership with Ford to create an innovative design that provides proper torsional vibration dampening characteristics for your 4.6L engine. And unlike other manufacturers that use a less expensive "piggyback" design, Steeda's one piece pulley is designed for maximum efficiency, durability, and power.

Premium Quality. Steeda creates this premium quality part using nodular iron and injection molded rubber for unsurpassed performance and heat resistance.

SFI Certified. Steeda was the first to achieve SFI approval on their underdrive pulleys for all 4.6L engines. By choosing an SFI Certified product, you're ensuring the product you choose has been made to the highest standards for quality and safety.

Fitment. For use on any 05-10 Mustang GT with Stock size belt.

Note: Coupon codes cannot be applied to this product.

Fitment: 2005 2006 2007 2008 2009 2010 Details

MPN# 701-0005-A

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

What's in the Box
  • (1) Crank Pulley
  • (1) Water Pump Pulley
Installation Info
Tech Specs
UnderDrive Pulley Specifications
Year/Model: 2005-2010 GT Manufacturer: Steeda
Material: Steel Finish: Black
Crank Pulley: One Piece Crank SFI Certified: Yes
Will it fit my Mustang?

    Customer Photos (12) Submit Your Photo

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      Questions & Answers (13)

      5 Top Rated Questions

      Does this install require you to reprogram the crankshaft position sensor?

      • The Steeda Underdrive Pulleys will not require you to reprogram the crankshaft position sensor.

      Helpful (0)

      Can I use the stock belt or I need to get a Bigger one ? Or s new one

      • This is for use with the stock belt size.

      Helpful (0)

      was curious if these UDP's will work for a 08 v6? was wanting to put them on and was also wondering if there would be any room for the crank sensor?

      • The Steeda Underdrive Pulleys will not work with a V6 model.

      Helpful (0)

      Helo I lost the two bolts that come with those pullies Can I use the stock bolts for installation or do u have replacement bolts I can buy

      • Unfortunately we do not sell Steeda Underdrive Pulleys bolts to replace the lost ones. It is recommended that you use new bolts however,you can use the stock bolts as well.

      Helpful (0)

      I bought his but still didn't install it What belt should I get to install along with it for best performance do you sell it too

      • The Steeda Underdrive Pulleys, would use the stock length belt.

      Helpful (0)
      Post Your Question
      8 More Questions
      Why does horse power very from manufactures? Steeda says up 10 HP and another manufacture say that there product will deliver up to 15 horse power. Is there a real difference? 1 answer
      am planning 2 buy Steeda CAI, am confused between those Roush's, would it be any advantage having Steeda Pulleys instead of Roush ? 1 answer
      I just bought a 2007 GT so I'm new to the 3v. I'm just wondering, why do none of the 3v underdrive kits have an alternator pulley, but 2v and 4v 4.6L have it? 1 answer
      Just a quick question about your UDP here. I plan on ordering it, but I need to know if it's going to effect my tune. Do I have to re tune my car after installing this UDP? Was hoping I can just toss it in there and it will add to my car instead of throwing the angry wrench icon on/check engine light. 1 answer
      Cause hotter engine temps? since the water pump pully is larger tht means it dosnt spin as fast correct? will this cause hotter coolant temps? also will these effect charging and a/c opperation as well? 5 answers
      Can i use the stock water pump pulley? I LOST MY WATER PUMP PULLEY DURING A MOVE!! I was wondering if you can use the Crank pulley with the stock water pump pulley. If not, do you know anywhere i can just buy the Water pump pulley instead of buying the whole set again? Thanks for any help! 2 answers
      New bolt needed? It doesnt seem like this kit comes with a new alternator bolt for the water pump's clearance. Is it simply not included or is it not needed? 2 answers
      Do these pulleys work with a blower? I got these pulleys and I'm planning on putting a Keene Bell blower on it. Will these underdrive pulleys work with it or will I have to put stock pulleys back on? 3 answers

        Customer Reviews (95) Write a Review

        Overall Rating 4.7

        out of 5 stars

        Installation Time:Afternoon

        Installation Cost:$100-$250

        • Performance Gain 4.338983 4.3
        • Fit 4.966102 5.0



        • 5/5

          Installation Time: Less than 1 Hour

          March 26, 2019

          Great fitment and easy install

          Easy to install once you get the factory harmonic balancer off. If you didnt know, you'll need a 3 jaw puller to get the factory off, not a typical 3 bolt. Once that was done, it all went together very easily. Looks great and noticed a decent improvement.

          David

          Year: 2008 Submodel: GT

          Helpful (0)

        • 5/5

          Installation Time: Afternoon

          March 26, 2019

          Worth the price!

          Gas mileage did improved for me a bit, went 20mpg to about 23mpg on the highway. Haven't dynoed the car yet to see if there were hp gains, but the car is a lot more eager to rev in the midrange and up. No problems with the alternator or water pump in 1 month of daily driving the car.

          AaronC

          Year: 2007 Submodel: GT

          Helpful (0)

        • 5/5

          Installation Time: Afternoon

          March 24, 2019

          RPM Response

          The butt dyno feels a stronger pull on first and second gear. More importantly, the torque seems to have improved across the entire band with sustained RPMs. This was a great mod in support of other mods. The install was easy, but did take about three hours to install simply because my harmonic balancer spun as I was loosening the bolt. I was able to get the bolt loose after having used a strap wrench to hold in place. Since I did loosen my belt, I also replaced the belt to get rid of the slight chirping sound. Overall, I’m pleased with the product!

          AlexZ

          Year: 2005 Submodel: GT

          Helpful (0)

        • 5/5

          Installation Time: Afternoon

          March 06, 2019

          Say.....Whaaaaat!!!

          Didn’t go into this purchase as a believer....I can give it a big “Amen brother”! Not earth shattering but did wake up 1st and 2cd gear, glad I took the plunge!

          RJ

          Year: 2008 Submodel: GT

          Helpful (0)

        • 5/5

          Installation Time: Less than 1 Hour

          February 17, 2019

          Buy or fall

          Really good for the money is you have tune. Whit othe modificacion like inteck and trotle body 65mm

          MALON

          Year: 2006 Submodel: GT

          Helpful (0)

        • 5/5

          Installation Time: Less than 1 Hour

          January 08, 2019

          Do it

          Did add some horsepower, but what you are really getting from this pulley is proper engine response. The car now responds with immediate power at any RPM and helps keep the horsepower curve more consistent. Get it pls

          CalebM

          Year: 2007 Submodel: GT

          Helpful (2)

        • 5/5

          Installation Time: Afternoon

          November 12, 2018

          Steeda never disappoints!

          Years ago I started my first project a 89 fox body. At first I price shopped every little item. That is until I tried a steeda underdrive pulley kit and I learned the importance of quality, fit, performance and good instructions is definitely worth a few pennies. From that point on the rest of the 89s suspension was Steeda and never disappointed So when it came time to replace the harmonic balancer on my wife's 2007 I went straight back to a supplier I trusted....Steeda, still quality and not overpriced.

          JonathanF

          Year: 2007 Submodel: GT

          Helpful (1)

        • 5/5

          Installation Time: Less than 1 Hour

          September 09, 2018

          Steeda Underdrive Pulleys Make A DIFFERENCE

          After installing my Steeda Underdrive Pulleys, I felt a huge difference in the pull in first and second gear! Did not affect alternator or power steering.

          BradleyL

          Year: 2007 Submodel: GT

          Helpful (1)

        • 5/5

          Installation Time: Afternoon

          August 08, 2018

          Steeda underdrive pulleys

          Easy install , I installed a airaid cai, bama tune and a 62mm tb at the same time , I noticed a big difference in my 07 gt perforance and went from 27 to 30 mpg , very happy

          DarrenW

          Year: 2007 Submodel: GT

          Helpful (3)

        • 5/5

          Installation Time: Afternoon

          May 04, 2018

          Great product

          Easy install and high quality. Can deffinately feel the difference.

          S197Richard

          Year: 2008 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Afternoon

          April 16, 2018

          Awesome!!!

          Great improvement, fairly easy install, let alone without a vehicle lift. Part was installed on my 2010 F-150, with the 2010 Mustang Gates serpentine belt. Runs good, can feel a more difference then before, even with all the other mods done to the truck. Looks real good as well. Thank you, I’m done modifying until a day the coyote motor goes in.

          Titus

          Year: 2010 Submodel: GT

          Helpful (5)

        • 4/5

          Installation Time: Shop Install

          March 27, 2018

          Feel the Pull

          Put these on and, yes I can feel the car pulling a bit harder! If you are unsure don't be, this pulley combo is the Best!!

          MichaelM

          Year: 2006 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Less than 1 Hour

          March 08, 2018

          Awesome

          Great product and goes along with a cai and a throttle body

          untamed

          Year: 2005 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Full Day

          February 21, 2018

          Steeda Underdrive Pullies

          I installed these Steeda Underdrive Pulleys myself and I must say it was not as easy as some make it out to be. However, the pieces seem to be of a high-quality build and I actually did feel a slight increase in acceleration. Overall I feel this product was worth it for the money, it looks nice under the hood and it does its job well. I also did not notice any loss of A/C or Power steering function.

          Metallica03

          Year: 2008 Submodel: Bullitt

          Helpful (7)

        • 5/5

          January 02, 2018

          Performance Boost!

          I wasn't sure if this small mode would be noticeable, but it really made a difference!

          Jimmy

          Year: 2007 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Afternoon

          December 07, 2017

          awesome product as always!

          supper easy to install! no issues! works great on my 2010 GT!

          TrenadyH

          Year: 2010 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Afternoon

          November 16, 2017

          u.d. pulleys

          enjoyed putting these on with my dad, easy job and took about 2 hours, can tell the difference when using accessories and gas mileage went up!

          Branden

          Year: 2006 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $100-$250

          November 06, 2017

          Steeda for the win!!!

          I purshased these in hopes to fix a sound coming from my pulleys. Turned out it was the idler pulley, but with these I have a much smoother launch. You can notice a difference in low end power, and they look very sharp.

          Flawlessfoose

          Year: 2006 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Afternoon

          September 21, 2017

          Great mod

          Worked very well for me no issues felt the get up and go

          JamesB

          Year: 2006 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: 0-$100

          August 07, 2017

          2010 GT

          Fast install went smoothly. No problems ran into at all. Highly recommended..thanks again AM!

          JacobB

          Year: 2010 Submodel: GT

          Helpful (5)

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