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BBK Underdrive Pulleys (94-98 V6)

Market Price $109.24 You Save 13% ($14.25)

$94.99

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  • Item 56029
  • MPN# 1619

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Features & Details

  • Gain Up to 15HP.
  • Two Piece Kit.
  • Brilliantly Polished Finish.
  • Fits 94-98 Mustang V6.
Gain 15HP. Unleash hidden horsepower and improve throttle response by reducing the amount of power your accessories are draining from your Pony. You may not know it, but you can regain up to 15 "free" horsepower with a set of BBK underdrive pulleys, without sacrificing charging ability or A/C 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 underdrive pulleys are for the 1994 to 1998 V6 3.8L Mustang. Will require a 96" serpentine belt.

Technical Note: This pulley system requires the use of a 6-rib 96" length serpentine belt.

Fitment: 1994 1995 1996 1997 1998 Details

What's in the Box
  • (1) Crank Pulley
  • (1) Alternator Pulley
Installation Info
Tech Specs
UnderDrive Pulley Specifications
Year/Model: 94-98 V6 Manufacturer: BBK
Material: Aluminum Finish: Polished
Crank Pulley: Piggyback SFI Certifited: No
Will it fit my Mustang?
  • V6 - 94, 95, 96, 97, 98

Most Helpful Reviews

5/5
Wow!

Wow! what a difference! more responce and power, no overheating probs. even with the air runnig and no noticable power loss!

Helpful (2)

4/5
quick and cheap mod!

I have been wanting this underdrive pully kit for quite sometime, so I think I expected more than I should have. But overall I do feel better throttle response and more power, and its a great addition ...

Read More
Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 49 Reviews

Customer Photos (18) Submit Your Photo

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4 Questions / 4 Answers

Ask a Question

will it fit on my 1999 3.8l mustang

Q2405

  • Unfortunately, these underdrive pulleys are only designed to fit the 1994-1998 V6 Mustangs and are not compatible with the 1999-2004 V6.

    LisaS

    Good Answer (2) (1)

Question Resolved

Sound system? I have a 1400w Amp connected to a Subwoofer. Is it okay if I have one, or should I not install this?

SilverbulletR6

  • These pulleys will have nothing to with the power output of the alternator for your sound system. 1400w amp is really nothing to worry about. Get a capacitor or higher output alternator for more power if you desire.

    Darkgreenstang52

    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

Will the BBK underdrive Pulleys work with the original belt, or do I need ato get a new size belt?

Titiania

  • The BBK Underdrive Pulleys (94-98 V6) will require the use of a 6-rib 96" length serpentine belt for the proper use.

    KevinD92

    Good Answer (0) (0)

Question Resolved

hows come they don't make a set of these for a 2001 v6

dullblade12

  • Unfortunately we do not offer an Underdrive Pulley Kit for a 2001 V6. We are constantly getting new items on our website. So keep checking back to our site in case we get one in the future!

    AshleyK

    Good Answer (1) (0)

Question Resolved

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Customer Reviews (49) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 4.5 4.5
  • Fit 4.875 4.9



  • 4/5

    October 17, 2009

    quick and cheap mod!

    I have been wanting this underdrive pully kit for quite sometime, so I think I expected more than I should have. But overall I do feel better throttle response and more power, and its a great addition to my bbk throttle body, and bbk CAI. thanks american muscle!

    Cody Ray

    Helpful (1) (0)

  • 5/5

    July 17, 2009

    Wow!

    Wow! what a difference! more responce and power, no overheating probs. even with the air runnig and no noticable power loss!

    Nick

    Helpful (2) (0)

  • 5/5

    May 09, 2011

    This will pay for itself. Get this before anything else!

    I finally decided to pay the $90 for this pulley as a nice, easy place to start onI finally decided to pay the $90 for this pulley as a nice, easy place to start on modifying my 98 3.8L. It looked like a good return for the dollar, and I was interested in mods that yield both HP and MPG. The install was quite easy and took less than an hour. I would say, though, that an impact wrench for the alternator nut saves tons of time. Buy or borrow one. Everything else comes off with hand tools. Also, take note that AM's wonderful installation instructions are far more involved than you'll need for this V6 UDP, as they appear to be geared for people who are installing more than just a UDP. They're helpful as a guide but you certainly won't need the pullers since you never mess with anything on the crank itself. If, for some reason, your original pulley is fused to the shaft, just give it a stout sideways blow with a rubber mallet. The instructions included with the UPD are actually quite comprehensive. They don't have the torque specs, but you can find these online and probably don't need them for a simple pulley, anyway. Don't forget to disconnect the negative battery cable. This way, when you start the car the ECU re-learns its situation and meters out the gas My car took a 96-inch belt, although I've read about other users setting up with 91's. I'd say try 96' first, and go from there. Results were immediate. The engine idles far more smoothly than before. I had some mild vibration/shaking problems before the UDP, and now it runs as smooth as silk. The engine seems quite happier and ready to put the power where it needs to be: the rear wheels. Power gains are notable, although not in-your-face dramatic, but certainly worth the $90 and then some. Throttle response is notably better, and it takes less gas input to do more work now, especially noticeable at low RPM's. Everything runs smoother and easier, with less throttle input required to so the same work, especially in traffic. What really floored me, though, was the increase in gas mileage. I had previously run anywhere between 23 and 27 MPG, depending on what I had done that week, with 27 MPG being had only once on a highway-only trip using the throttle very lightly and using no AC. Typical mileage has been around 24-25 MPG. I took a trip the day after installation to see what my new highway economy was. After pumping the gas back in and calculating, I had to check my math two or three times to make sure I hadn't made a huge error. Sure as anything, I had just gotten 31 MPG. For comparison, a 2011 Nissan Altima is advertised around 32 MPG highway. 31 is not bad for a 13-year old car with a least 140,000 miles! If I work my math out right, assuming gas stays around $4 per gallon, this pulley will pay for itself after 10 tanks and after that, I'll be making money back. It makes no sense NOT to buy this. Your mileage may vary, but for me, it's like having the horsepower of a healthy V6 with the appetite of a 4-cylinder economy car. In fact, I think I get more miles per gallon than my wife's 4-cyl economobile does now. So, the bottom line is this: This UDP is inexpensive, easy to install, will get you some noticable lost horsepower back, let your engine last longer and work less, and increase your gas mileage enough so that after 10-12 tanks of gas, you will have made your money back and then some. Don't wait. Get it. modifying my 98 3.8L. It looked like a good return for the dollar, and I was interested in mods that yield both HP and MPG. The install was quite easy and took less than an hour. I would say, though, that an impact wrench for the alternator nut saves tons of time. Buy or borrow one. Everything else comes off with hand tools. Also, take note that AM's wonderful installation instructions are far more involved than you'll need for this V6 UDP. They're helpful as a guide but you certainly won't need the pullers since you never mess with anything on the crank itself. If, for some reason, your original pulley is fused to the shaft, just give it a stout sideways blow with a rubber mallet. My car took a 96-inch belt, although I've read about other users setting up with 91's. I'd say try 96' first, and go from there. Results were immediate. The engine idles far more smoothly than before. I had some mild vibration/shaking problems before the UDP, and now it runs as smooth as silk. The engine seems quite happier and ready to put the power where it needs to be: the rear wheels. Power gains are notable, although not in-your-face dramatic, but certainly worth the $90 and then some. Throttle response is notably better, and it takes less gas input to do more work now, especially noticeable at low RPM's. Everything runs smoother and easier, with less throttle input required to so the same work, especially in traffic. What really floored me, though, was the increase in gas mileage. I had previously run anywhere between 23 and 27 MPG, depending on what I had done that week, with 27 MPG being had only once on a highway-only trip using the throttle very lightly and using no AC. Typical mileage has been around 24-25 MPG. I took a trip the day after installation to see what my new highway economy was. After pumping the gas back in and calculating, I had to check my math two or three times to make sure I hadn't made a huge error. Sure as anything, I had just gotten 31 MPG. If I work my math out right, assuming gas stays around $4 per gallon, this pulley will pay for itself after 10 tanks and after that, I'll be making money back. It makes no sense NOT to buy this. Your mileage may vary, but for me, it's like having the horsepower of a healthy V6 with the appetite of a 4-cylinder economy car. In fact, I think I get more miles per gallon than my wife's 4-cyl econo-car does now.

    Kevin

    Year: 1998 Submodel: V6

    Helpful (26) (3)

  • 5/5

    August 05, 2010

    Quick and Easy

    Super simple, takes a just a couple of minutes to install. Noticed increased performance. I was a little worried my alternator wouldn't be able to handle my sound system after this install. After i installed it, I turned my AC to max and the volume all the way up and noticed no difference. If your looking for a simple mod you don't get any better than this.

    Brandon

    Helpful (8) (0)

  • 5/5

    May 27, 2011

    Makes It even Sweeter

    When i opened the box i looked at it and said this thing gives you 10-15 extra horses? took me 25 min to install very simple and easy. the installations requires a 18mm socket for the tensioner, and 7mm for the bolts where the crankshaft pulley is located. very easy make sure you use a 6rib 96" belt worked fine and its on with a perfect fit, took it to the dyno before this upgrade, dynoed 183HP, with a AMERICAN MUSCLE CAI, and a tune from SCT well worth the money, Took after the install 216HP with the SCT this product works great feels good/ looks good. very good product definitly worth the money will be uploading pics thanks AMERICAN MUSCLE will be installing theBBK 56mm Throttle Body next.

    Carlos B

    Year: 1998 Submodel: V6

    Helpful (6) (0)

  • 5/5

    August 17, 2010

    Enjoy your V6

    Very easy and painless install. The hardest part about this install was finding the right belt, considering the 96 in belt was far from the right. I went with a 92 in belt in the end. Took the alternator off and took it to an oreillys, and they changed the A pulley for me. Very easy

    Patrick Clark II

    Helpful (6) (0)

  • 5/5

    June 11, 2011

    Easy install fun to drive

    Bbk underdrive pulley set, the product is really nice, no dislikes, the install was very simple took 15 Min on the underdrive pulley you need a 10mm to loosen those four bolts, after you loosen those bolts you need an 18mm wrench to loosen the belt tensionor, after that's done take the belt off. Take the bottom four bolts coompleatly off of the underdrive slips right off replace with the bbk underive and replace bolts make sure you use the tork spec from the owners Manuel from ford. After that's done move on to the alternator remove off (if you do not have a air impact gun) take to local oralleys store they do it for free. But if you do have leave on there and replace pulley. Make sure you get a 6rib 96" belt it fit perfact on my car. After that you are done, turn on car see if belt does not slip if it doesn't you are good. After this install I took my car from Arizona to California over memorial day weekly end I actually got around 29-33 mpg and little more noticeable horses Hopes this helps.

    Carlos Buenrrostro

    Year: 1998 Submodel: V6

    Helpful (5) (0)

  • 5/5

    June 04, 2010

    3.8 UD Pulleys

    I installed the kit myself. I recommend only attempting if you can use impact wrench. I purchased a 91" belt which fit tight. Disconnect negative battery terminal. After computer re-learns alternator/AC functions, there is no loss in battery or air conditioning. I installed a K&N CAI at the same time and I am VERY happy with the difference in performance. I went joy riding on curvy country roads for hours afterward.

    Robb

    Helpful (5) (1)

  • 5/5

    March 01, 2011

    Nice

    Noticed a little HP increase with higher RPM's. The pulleys make my car run much smoother. At idle and slow speeds the car is nice and quiet and idles a lot smoother than it did before. One of the camshaft pulley screws somehow broke when installing. I ended up using a 6 rib 94in belt which fit tight. Great product and can help make your car last longer. I am satisfied with them.

    Jesse

    Year: 1994 Submodel: V6

    Helpful (3) (0)

  • 4/5

    February 11, 2009

    Some Good, some bad

    Me and my cousin installed my under drive pulleys. I took another posters advice and it was correct. The description calls for a 96 inch length belt, but its actually a 6 rib 91 inch belt. The crankshaft pulley was extremely hard to get off, and we ended up having to buy an air wrench, only 70 bucks from a pawn shop. All and all, it was worth it.

    Aaron

    Helpful (3) (0)

  • 5/5

    Installation Time: Afternoon

    April 08, 2012

    Underdrive Pullye

    These underdrive pulleys were what my car needed! My engine and car don't shake as much any more and it feels a lot somother. The gains on torque and horsepower are noticable. I will continue with the throttle body. BBK makes great products. Thanks AM and BBK!

    Sergmeister

    Year: 1998 Submodel: V6 Montrose, CA

    Helpful (2) (0)

  • 5/5

    August 16, 2011

    Great product

    I like the polished and seemed very solid material. Easy to install took me about 2 hours but i removed other pulleys and painted them so that is counting the time i spent waiting. Also the the kit calls for a 96in belt and on my 97 3.8 engine it was too loose. I went with a 94 1/2 belt. After trying four other belts. No charging problems, yet. You can really feel the difference, engine runs smoother. Also when i would take off my engine would shake a little bit and that is gone.

    Alex

    Year: 1995 Submodel: V6

    Helpful (2) (0)

  • 5/5

    August 03, 2011

    Great mod for price

    Went and had installed today also with new plugs and wires, and i cannot believe the before and after difference, the throttle response is crazy and really seems to help in the 3000-5000 RPM range,easy install, and used a 95.5 serpentine belt, the 96 felt a little loose, as im sure it might stretch eventually. thanks AM!!

    Josh

    Year: 1997 Submodel: V6

    Helpful (2) (1)

  • 5/5

    May 15, 2011

    Great

    Quick and easy to install the only problem is that when I installed the pulley kit it says it requires a 96" belt but in reality it's a 92" belt and after about a couple of days the belt started to sqeek when I started my stang up cold but after a while went away once it warmed up.. Other than that great product and would reccomend it to anyone

    Cody

    Year: 1998 Submodel: V6

    Helpful (1) (0)

  • 5/5

    August 14, 2008

    awesome.

    I had previously had a pulley kit from another company with just the crank pulley, and ended up having charging issues with the alternator. so, i ordered this kit and it works really well. i\'m using a 6 rib 96\" belt right now, which is a little slack, but it does work. i can always change the belt at a later date, it\'s not slipping or anything. overall though, it works pretty good.

    J. Francis

    Year: 1996

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    May 19, 2012

    Nice!

    Didn't know how much of a difference the pulleys would make but WOW definitely a noticeable difference! The throttle response has improved quite a bit! My engine doesn't shake hardy at all. The install took about an hour. Had to take the alternator to someone with an impact gun. I first bought a 94'' belt but it was to small so I went with the 96'', fit great! Good bolt on! Buy it!

    Nick

    Year: 1998 Submodel: V6 Denver, NY

    Helpful (1) (1)

  • 5/5

    October 02, 2010

    Easy install, great investment

    Installed in 10 minutes. Used a 96" belt and fit perfect. Looks great under the hood, and I am having zero charging problems or electrical problems. Love it.

    Spiff

    Helpful (1) (1)

  • 4/5

    July 22, 2010

    ??????

    I thought this was gonna be easy cause everyone else said it was. I got the crank pulley off without an impact wrench but the alternator, heck no! I basically ruined the old alternator pulley trying to get the bolt off. Also I'm using a 94" belt, not no 91" or 96". Power gains are worth the money though...

    Ian

    Helpful (2) (2)

  • 5/5

    August 10, 2008

    pain in the 6

    It\'s a great product, however, I experienced a lot of difficulty finding the right belt the part. It calls for a 6 rib 96 belt, but it really requires a 6 rib 91 inch belt. Other than that, it\'s a great product.

    just6in

    Helpful (1) (1)

  • 4/5

    Installation Time: Less than 1 Hour

    November 08, 2011

    Cheap and quick

    Okay so First of all, the crankshaft under drive is good, its definitly smaller, and somewhat good quality. Easy to take off, easy to put on. The only bad thing is, that it says it comes with the water pump pulley, but it doesn't. it comes with an alternator pulley which really defeats the purpose of it all. So i didnt put it, so far no charging problems, everything is good, i do feel a little difference, nothing that crazy. I went to autozone and asked them to get me a belt 8 sizes smaller than the stock one and it fit tight but good. Lets see if it helps out in gas too. overall, i think its not worth 90 bucks, cause its just a alluminum pulley, but if you have the money, eh its worth a shot.

    Dannyg

    Year: 1996 Submodel: V6 Miami FL

    Helpful (0) (1)

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