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BBK Underdrive Pulleys (96-Mid 01 GT; 96-99 Cobra)

Market Price $183.99 You Save 13% ($24.00)
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  • Item 56007
  • MPN# 1555

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Features & Details

  • Gain Up to 15HP
  • Three Piece Kit
  • Brilliantly Polished Finish
  • Fits 96-Mid 01 GT and 96-99 Cobra
Gain 15HP. You might not know it, but your accessories are draining up to 15HP they don't need. But you can get those ponies back by adding a set of BBK underdrive pulleys. BBK underdrive pulleys are designed so you can reduce the load your accessories put on your engine, without sacrificing cooling or charging performance.

Premium Quality. Made of aircraft quality aluminum alloy, these BBK aluminum pulleys won't weigh you down.

Hand Polished. The brilliant polished finish of these underdrive pulleys will give your engine bay a high performance look.

Easy Installation. Installation normally takes about 30 minutes and full instructions are included.

Application. These BBK underdrive pulleys are for the 1996 to Mid 2001 GT and 1996 to 1999 Cobra with a long water pump (bowed out face). Re-uses factory serpentine 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.

Fitment: 1996 1997 1998 1999 2000 2001 Details

What's in the Box
  • (1) Water pump pulley
  • (1) Alternator pulley
  • (1) Crank pulley
Installation Info
Tech Specs
Underdrive Pulley Specifications
Year/Model: 96-Mid 01 GT;
96-99 Cobra
Manufacturer: BBK
Material: Aluminum Finish: Polished
Crank Pulley: Piggyback SFI Certified: No
Will it fit my Mustang?
  • Cobra - 96, 97, 98, 99
  • GT - 96, 97, 98, 99, 00, 01

Fits 1996 to Mid 2001 GT and 1996-1999 Cobra Only

People Who Bought This Item Also Bought

Most Helpful Reviews

pretty good

it definitely looks better than stock and maybe i feel a slight increase in throttle response, but the harmonic balancer also wobbles and makes me uncomfortable. i dont like the idea that instead of replacing ...

Read More
Helpful (9)

nice pulleys

very nice product,,,,very simple install, looks great,,,

Helpful (3)

Overall Rating 4.6 out of 5 stars
Read All 28 Reviews

Customer Photos (6) Submit Your Photo

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Q & A

Ask a Question

With a vortech supercharger bolt on, and the underdrive pullies. What belt is compatible with this set up?


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Customer Reviews (28) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Full Day

Installation Cost:0-$100

  • Performance Gain 3.833333 3.8
  • Fit 4.833333 4.8

  • 4/5

    May 12, 2010

    pretty good

    it definitely looks better than stock and maybe i feel a slight increase in throttle response, but the harmonic balancer also wobbles and makes me uncomfortable. i dont like the idea that instead of replacing the stock balancer they just have you glue the new one into your stock one.. i am happy with this product but in hind sight i would have gone with steeda since they send you all new parts, even though they aren't chrome nd bad@$$ looking.


    Helpful (9)

  • 5/5

    December 22, 2009

    nice pulleys

    very nice product,,,,very simple install, looks great,,,


    Helpful (3)

  • 4/5

    November 30, 2009

    great buy

    this a a great buy for cheap horsepower!!!! looks great also i would recommend anyone to buy this product!!!

    kurtis garcia

    Helpful (2)

  • 4/5

    August 14, 2016

    Bbk pulleys

    Product was great, pulleys well made. Gained maybe a few hp. Car feels alot quicker. I recommend this product.


    Year: 2001 Submodel: GT

    Helpful (1)

  • 4/5

    July 26, 2016

    Worth but not a fan of the setup

    Great product, purchasing a new belt for the different sized pulleys isn't necessary which made me happy. Everything goes on great except i wasnt a fan of how the new crank pulley they give you is just bolted on to the one i already have. Its a strange setup to me. I did notice a slght change in sound coming from the engine that i like aswell as a slight noticeable increase in HP


    Year: 2000 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    February 14, 2014

    Nice product

    Very impressed with the look and finish of the pulley's, I put it took an afternoon, but there was some beer breaks involved! very easy to install. and now the car is more responsive. Love the BBK products that I've used. K


    Year: 1997 Submodel: GT Reno, NV, USA

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    April 06, 2013

    BBK Under Drive Pulleys

    If it's added HP and a good looking engine you want, these BBK pulleys do the trick. Two benefits with one product. The pulleys were well finished. Installation was easy with air tools and a puller. I recommend removing the electric fan and shroud to make the install easier. Gave me an opportunity to clean up and detail some other engine parts in the area.


    Year: 1996 Submodel: Cobra Coquitlam, BC, Canada

    Helpful (1)

  • 4/5

    Installation Time: Shop Install

    April 01, 2012


    this is a must have for your pony. car runs so much better. please get new belt with this set. old belt will wine. looks great and it works. worth every penny


    Year: 1996 Submodel: GT Dyersburg, TN, USA

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    January 29, 2012

    BBK Underdrive pulleys are great,

    I have a 1997 mustang cobra,and I can feel the difference in my take off and you can feel the difference in horse power.This is a great product from BBK keep up the good work.


    Year: 1997 Submodel: Cobra Chicago IL,

    Helpful (1)

  • 5/5

    November 09, 2010

    BBK Underdrive Pulleys

    This Pulley system is awesome, i felt a huge difference in my 1997 automatic mustang gt, well worth the buy, acceleration dramtically impoved including throttle response. I would recomend this product to anyone


    Year: 1997 Submodel: GT

    Helpful (1)

  • 5/5

    September 05, 2009


    I was looking to free up some power without spending alot of money. So i went with the Under Drive Pulley set and man does it free up some power. I thought it would be hard to install, but the video installation made it so easy!!!!

    Aaron Schneider

    Helpful (1)

  • 5/5

    August 28, 2009

    Looks Great

    Definitely felt a gain with these and the SCT tuner and looks great under the hood


    Helpful (1)

  • 5/5

    August 26, 2009

    BBK Underdrive Pulleys

    Got these from a friend but figured I would review them on here. These are a nice lil add on if you are looking for that extra little bit. It brings the rpms up a lil quicker and they give a tad more lower end torque! Cant really feel much difference with only a claimed 10-15 hp increase. They look great and makes me feel like they are doing somthing!

    RJ Brown

    Helpful (1)

  • 5/5

    June 04, 2009

    nice kit

    very nice product. looks bad ass and it sure does add hp to ur pony.


    Helpful (1)

  • 5/5

    November 27, 2008

    Pulley Kit

    They were easy to put on. You just need a puller. I already had one so it was quick, but they dont cost much to rent either. They look nice on the car too and great adds and gain of power.


    Helpful (1)

  • 5/5

    April 21, 2008

    pulley kit

    didn\'t think it would be this easy. looked harder than it actually was. harmonic balancer pullers ain\'t that expensive. i found the directions pretty cut and dry. if you are any kind of gear head, this is pretty standard and straight forward project! gained surprising mid range power and a litlle bit better fuel economy(when i can keep my foot out of it)lol.

    mad maj

    Helpful (1)

  • 5/5

    November 06, 2007

    Pulley kit

    Great adds in gain and power. Looks great too. Need to use a puller to remove cam pulley. The rest is \"butter\"


    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 20, 2017

    B b K

    It made muy engine feel a lot smoother, and the response i feel like it improve.


    Year: 2000 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    October 05, 2017


    Nice pulleys!! Only thing that I didn't understood was why would you attach the stock harmonic balancer to the new one??


    Year: 1998 Submodel: Cobra

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    September 07, 2017


    Light weight, easy to install and makes for a good look at the show.


    Year: 1999 Submodel: GT

    Helpful (0)

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