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

Market Price $181.99 You Save 12% ($22.00)
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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

    CA Residents: Warning: California's Proposition 65

    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?

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    Questions & Answers (3)

    3 Top Rated Questions

    Do the bbk underdrive pulleys require the use of the factory harmonic balancer? I see some picks without it and with it bolted to underdrive crank pulley Thanks

    • The BBK Underdrive Pulleys will require the harmonic damper/balancer bolted to the crank pulley, or engine damage could occur.

    Helpful (0)

    I have balance the stock harmonic balancer do I need to balance this one as well

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

    • We strongly recommend against using the BBK Underdrive Pulleys with any supercharger, as this will effect boost pressure.

    Helpful (0)
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    Customer Reviews (29) Write a Review

    Overall Rating 4.6

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:0-$100

    • Performance Gain 3.769231 3.8
    • Fit 4.846154 4.8

    • 4/5

      Installation Time: Less than 1 Hour

      July 13, 2018

      Red 97gt

      I was kind of worried about putting on the piggyback underdrive style but I wanted to dress up under the hood and steedy didn't have the polish underdrive but wow I was surprise with the bkk underdrive the car have better take off and more power in 3rd I would recommend the bkk underdrive


      Year: 1997 Submodel: GT

      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 (3)

    • 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 (4)

    • 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 (2)

    • 4/5

      Installation Time: Less than 1 Hour

      August 08, 2017

      Polished Pullies.

      I was in the market for polished under drive pullies and chose the BBK. I did not want piggy back style pullies but I could not find polished versions that replaced the harmonic balancer. Steeds makes one that replaces the harmonic balancer but doesn't come polished. The BBK piggy back pulley functions well with a very noticeable improvement in performance. Coupled with the BBK all in one throttle body my 2000 GT runs GREAT. The engine breaths and rev much quicker. I would have been happy to pay more and gotten a polished harmonic balancer since I do attend numerous car shows.


      Year: 2000 Submodel: GT

      Helpful (2)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      July 23, 2017

      BBK under pulleys

      Nice product, well constructed and finished. I've noticed a bit improved response. Far as horse power, no. I'm sure with add mod's and tuning there will be a difference.


      Year: 1999 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      July 02, 2017

      Definitely a must have

      Throttle response is slightly improved. Looks nice and clean.


      Year: 2002 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      June 07, 2017


      Love this product really high quality and helps add power


      Year: 1998 Submodel: GT

      Helpful (3)

    • 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 (3)

    • 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 (3)

    • 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 (4)

    • 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 (3)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      June 21, 2012

      love the look

      i felt some gain in acceleration and throttle response...i recomend this product...


      Year: 2001 Submodel: GT Huntingdon, TN 38344, USA

      Helpful (2)

    • 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 (3)

    • 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 (3)

    • 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 (3)

    • 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 (13)

    • 5/5

      December 22, 2009

      nice pulleys

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


      Helpful (5)

    • 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 (4)

    • 5/5

      October 30, 2009


      I am very happy with your products. I am glad I found your company on the internet.


      Helpful (2)

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