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BBK Underdrive Pulleys (Late 01-04 GT)

27 Reviews
Our Price

$159.99

  • Item #56008
  • MPN #1559
  • Market Price $183.99
  • You Save 13% ($24.00)
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Customer Photos
Features
  • Gain up to 15HP
  • Three Piece Kit
  • Brilliantly polished finish
  • Fits Late 2001 to 2004 GT
Description
Gain 15HP. Improve throttle response and add power throughout your RPM range by reducing the amount of power you're losing to your accessories. And best of all, you don't have to sacrifice your A/C or charging performance - you can free up as much as 15HP with a set of BBK underdrive pulleys for your GT without negatively affecting your Mustang's ability to keep you cool. 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. This BBK Underdrive Pulley kit installs quickly and easily in under 2 hours with no modifications required.

Application. These BBK underdrive pullies are designed to fit the Late 2001 to 2004 GT Mustangs with the short water pump pulley with a bowed in face. Re-uses stock 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.

Mustang Fitment: 2001 2002 2003 2004 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: Late 2001-2004 GT Manufacturer: BBK
Material: Aluminum Finish: Polished
Crank Pulley: Piggyback SFI Certified: No
Fitment
  • GT - 01, 02, 03, 04

Most Helpful Reviews View All

Overall Rating 4.7/5 Write a Review
5/5
Why didn't I do this sooner

Love the pully's!! Cheep in price and noticable power all the way through the RPM band. Only problem is the 3 speeding tickets I got in the last month.

Helpful (22) (2)

5/5
BBK UDPs

Straight forward, easy install, well once you get the stock parts off. Only thing me n my buddy had trouble with was getting the stock harmonic balancer off but once we got it off, the rest was cake. Nice

Read More
Helpful (18) (3)

Customer Photos (7) View All

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Q & A (1 Questions, 1 Answers) Ask a Question

can I put this on my stock 03 mustang gt?

UrbanGt Year: 2003 Model: GT

Good Question (0) (0)
  • yes, you can.

    Helpful (0) (0)

    Jmont Year: 2003 Model: GT

Answer This Question

Reviews (27) Write a Review

  • 5 Stars .74 74%
  • 4 Stars .22 22%
  • 3 Stars .04 4%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.7

out of 5 stars

27 Customers Recommend this Product

Installation Time:Full Day

Installation Cost:$100-$250

  • Performance Gain: 4.142857 4.1/5
  • Fit: 5 5/5
  • Bang For Your Buck: 4.571429 4.6/5
Filter By Sort By
  • 5/5

    Why didn't I do this sooner

    June 23, 2010

    Love the pully's!! Cheep in price and noticable power all the way through the RPM band. Only problem is the 3 speeding tickets I got in the last month.

    J. White

    Helpful (22) (2)

  • 5/5

    BBK UDPs

    July 11, 2010

    Straight forward, easy install, well once you get the stock parts off. Only thing me n my buddy had trouble with was getting the stock harmonic balancer off but once we got it off, the rest was cake. Nice increase in throttle response, my car was noticeably quicker. To the previous reviewer, maybe if you got the right pullies for your year, you wouldn't have had those problems.

    Justin

    Helpful (18) (3)

  • 5/5

    03 GT

    April 13, 2009

    I added these pulleys and got 12 more horses. Quick and easy hps. Takes 30 minutes tops.

    Al

    Year: 2003 Model: GT

    Helpful (9) (0)

  • 4/5

    BBK Underdrive pulleys

    October 20, 2010

    Install was very easy overall. Once I got them on and drove my car i was super impressed at how fast my car picked up when floored. My only gripe is that this is a piggy back setup. If i would have known that I would have bought the Steeda kit instead. Great though if your trying to get the performance and save a few bucks.

    Matt W.

    Driving Style: Daily Driver

    Helpful (8) (0)

  • 5/5

    Worth the price

    October 06, 2009

    Installed on my 01 GT. I put these on after I sold vortech blower and set car up to run nitrous, best thing I ever did, I did a few thousand bucks worth of mods at once so Im not sure if Id notice the power ofem but they look good. O and dont be dumb REUSE UR DAMPER! Just paint it black and bolt it onto the face of the bbk crank pulley like its suppose to be. I see so many people not doing this, Not the smartest thing in my book..

    Parker

    Year: 2001 Model: GT

    Helpful (6) (0)

  • 4/5

    nice addition

    August 18, 2010

    a fairly simple install, my advice is to get a proper harmonic balancer puller and remove the fan to give you some additional room to work. throttle response was crisper, and no noticeable affect on cooling. great product at a decent price. looks nice under the hood when all polished up

    corey

    Helpful (5) (1)

  • 5/5

    Excellent with a fresh air intake.

    November 11, 2012

    We went on a road trip to Boston. The trip was just over 3800m. I averaged 20.3 mpg. This year we went on a roadtrip to Yellowstone, about 5300m. I averaged 23.04 mpg. The changes in the car between the trips where a fresh air intake, under drive pulleys, and a 3 tune chip. The tune made the least impact in fuel economy. I used the street tune for the trip out on I94 and the stock tune on the I90 heading home. They came back as 24.52 and 24.14 repectively. The flat highway average for the whole trip is 24.35. Not too much difference but it is there. The intake and pulleys took the mileage up over 13%. I think that is pretty impressive. The car is a ragtop. The coupe will do better. On the performance end of things the results are the same. There is a huge difference in driveability. Both the intake and the pulleys changed the way the car performs coming off the line. They made the car feel lighter and stronger. The difference with the chip is there but shows up more on the track performance with the performance 87 and race 91 tunes. The intake and pulleys are must haves, the chip is a nice to have.

    Johns2004GT

    Year: 2004 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Ottawa, Ontario, Canada

    Helpful (3) (0)

  • 4/5

    good product

    September 19, 2012

    It helped my gas mileage a bit and i needed that little extra power to get my stang to 350 hp. AM has never disappointed me and I still purchase products nonstop. Stop reading reviews and just buy it fool!

    flooritconstantly69

    Year: 2003 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 michigan

    Helpful (3) (0)

  • 5/5

    Very nice

    October 22, 2008

    Got these a month ago for my 01 GT and was very impressed for price. Well made and a nice finish. Set these next to your stock pulleys and the difference in weight is amazing. Noticeable performance gain in response and between gears. ONLY TOOK ME 45 MINUTES TO INSTALL. Great to work with AmericanMuscle.com! Fast shipping, low price, and great product.

    Robert

    Year: 2001 Model: GT

    Helpful (1) (1)

  • 5/5

    BBK Underdrive Pulleys for my 2002 GT

    May 19, 2008

    My mechanic just installed these and I can notice a good gain through out the entire power band. The only problem we ran into is that some 2002 GTs will actually have the water pump from 2001. Not a huge problem just change the water pump to fit. Other than that nice product.

    Joe Flemming

    Year: 2002 Model: GT

    Helpful (1) (1)

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