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SR Performance Underdrive Pulleys - Polished (96-Mid 01 GT)

24 Reviews
Our Price

$84.99

  • Item #41129
  • MPN# 41129

  • Market Price $96.99
  • You Save 12% ($12.00)
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Product Videos Customer Photos
Features
  • Free Up 10-15 Horsepower
  • Complete 3 Piece Kit
  • Durable, Lightweight Aluminum
  • Brilliant Polished Finish
  • Premium Quality Construction
  • Fits 1996-Mid 2001 GT Mustangs
Description
Free Up Horsepower. A set of SR Performance Underdrive Pulleys reduce parasitic drivetrain loss by cutting down the amount of power your accessories take up, these underdrive pulleys will free up 10-15 horsepower, without sacrificing cooling and charging functionality of your Pony.

Premium Quality Construction. CNC-machined from lightweight aircraft grade quality aluminum alloy for strength and durability, these SR Performance pulleys feature a bright polished finish that will give your engine bay an eye-catching high performance appearance.

Easy Installation. These SR Performance Mustang Underdrive Pulleys installs quickly and easily in under 2 hours with no modifications required.

Application. This SR Performance 3-Piece Polished Aluminum Underdrive Pulley Kit is designed for use on 1996 to 2001 GT Mustangs equipped with the SOHC 4.6L V8 engine and the a long water pump (bowed out face). Reuses factory 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) Crank Pully
  • (1) Water Pump Pully
  • (1) Alternator Pully
  • (4) Bolts
  • (3) Washers
  • (2) Spacers
  • (1) Instruction Sheet
    Hardware included:
  • None Required
Installation Info
Tech Specs
Underdrive Pulley Specifications
Year/Model: 96 to Mid 01 GT Manufacturer: SR Performance
Material: Aluminum Finish: Polished
Crank Pulley: Piggyback SFI Certified: No
Will it fit my Mustang?
  • GT - 96, 97, 98, 99, 00, 01

Most Helpful Reviews

5/5
Pulleys installed with my first dyno tune.

It had a significant change with the dyno tune. No heavy lag or draw.

Helpful (1)

2/5
not so great....

Had bad luck from the get go. As bolt did not fit my crank. after finally finding a work bolt, it lasted about 5 months before my crank pulley had cracked! glad i caught it soon! they do look nice, and ...

Read More
Helpful (9)

Read All 24 Reviews
Overall Rating 4.4 out of 5 stars

Video

Hey I’m Justin with AmericanMuscle.com, and I’m going to be breaking down the SR Performance underdrive pulleys, fitting the 4.6L V8 motor found in all 96-04 Mustangs. Engine accessories like the AC compressor, water pump and alternator can really rob your car of horsepower, a great example of how an accessory can really eat up is whenever you turn your car’s AC on, and instantly everything feels a little more sluggish. This is referred to as parasitic drag. The job of an underdrive pulley is to turn the different accessories at a different speed by using a different sized pulley, thus requiring less amount of energy from the engine to turn the accessory belt. This reduction in drag on the crank shaft will allow the engine to work more efficiently, and should equate to more power at the rear wheels. The SR Performance kit does include a brand new crank pulley, a new water pump pulley which will differ depending on your year, a new alternator pulley, and all the hardware and spacers needed for the install. All 3 pulleys have been made from lightweight aluminum and feature a nice bright polished finish, which should definitely help the appearance side of things underneath the hood. As far as the install is concerned, it really shouldn’t be all that bad, ideally, you should have a torque wrench on hand before you get started, as well as some high temp RTV sealant and a breaker bar for that crank pulley. Again this isn’t the hardest job, but you should expect to spend about 2 hours getting everything bolted up. If you should have any problems, you can always reference the detailed instructions along with pictures located on this product page. So if you’re looking to take some of the drag off your accessories, in turn freeing up some horsepower, and improving your throttle response, then you should definitely check out these pulleys from SR Performance, available right here at AmericanMuscle.com

Customer Photos (14) View All Photos

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4 Questions / 5 Answers

Ask a Question

what belt size do u use

cobraracing

Show 3 more answers Question Resolved

SR Performance Underdrive Pulleys (96-Mid 01 GT) Does it also give you any torque or just hp?

Evan

  • Since torque is the ability to maintain speed against resistance, you will gain torque at your wheels since there is less resistance on the crank pullley.

    Chasing300

    Good Answer (2) (0)

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

99 mustang cobra would this pulleys fit my 99 mustang cobra its a 4.6 dohc

moyrod

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Customer Reviews (24) Write a Review

Overall Rating 4.4

out of 5 stars




  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    April 25, 2016

    Pulleys installed with my first dyno tune.

    It had a significant change with the dyno tune. No heavy lag or draw.

    Powerhouse

    Year: 1996 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1

    Helpful (1) (0)

  • 2/5

    April 19, 2011

    not so great....

    Had bad luck from the get go. As bolt did not fit my crank. after finally finding a work bolt, it lasted about 5 months before my crank pulley had cracked! glad i caught it soon! they do look nice, and it seemed to improve throttle response a slight bit, and mid range power seemed a hair better, but not worth the risk. I've read countless horror stories from this set of UD pulley's. GO with Steeda. They seem to have their stuff down!

    JoeyR

    Year: 2000 Model: GT Driving Style: Daily Driver

    Helpful (9) (3)

  • 5/5

    March 28, 2011

    Underdrive pulleys

    What i liked about this product is the chrome finish thats it has it. They looks great under the hood.The thing i didn't like about the product was that i had to re-use of my old crankshaft pulley to balance it. But for the price it cost i don't mind it because it works great. My car feels like it got a boost in power and thats what i wanted. I would recommend it because is a good product, very affordable an it works great. Than

    Estevan Acosta

    Year: 1998 Model: GT Driving Style: Daily Driver

    Helpful (6) (2)

  • 4/5

    Installation Time: Less than 1 Hour

    January 30, 2013

    Easy HP

    Easy to do, and the car runs great. Make sure you get a puller for the crank. Great time to change your belt if needed.

    Sn95blk

    Year: 1998 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 4 Grayson, ky

    Helpful (2) (0)

  • 5/5

    March 07, 2011

    UNDERDRIVE

    GREAT BUY. I COULD FEEL THEM WORKING WHEN I STEPP OFF IN THE GAS. ONE THING THOUGH MIGHT WANNA CONSIDER GOING TO THE PARTS STORE AND UPGRADE THE BOLTS THAT COME WITH THE PULLIES TO A STRONGER GRADE. I MEAN I DID BUT YOU DONT HAVE TO.

    MILES

    Year: 1996 Model: GT Driving Style: Street / Strip

    Helpful (3) (1)

  • 5/5

    February 26, 2011

    Underdrive pulleys

    Had these installed when I had my alternator replaced. Could tell the difference they made with throttle response off the line. Nice, inexpensive mod.

    Jamis H

    Year: 2000 Model: GT Driving Style: Daily Driver

    Helpful (3) (1)

  • 4/5

    Installation Time: Afternoon

    August 18, 2014

    Easier to install than I thought.

    These underdrive pulleys were a little easier to install than I had thought. The instructions could be a little more detailed though. There wasn't enough room in front of the alternator pulley to get my impact wrench in. I ended up removing three nuts that hold the radiator overflow tank on and rotated it clockwise to set it on the power steering fluid reservoir, being careful not to damage/disconnect the hoses. The next issue was trying to remove the crankshaft pulley bolt. The instructions only say to put it in gear for a manual transmission. I had it in 1st gear and it kept trying to turn the wheels. Putting it in 5th gear solved the problem and I was finally able to get the bolt loose. Finally, when I put the new alternator pulley on, the nut would press the pulley against the alternator housing so that it would not turn. The set included a couple bushings but the instructions do not mention them at all. I tried putting one over the alternator shaft but it was too short and did not help. The other one was longer but the inside diameter was just too small to fit over the alternator shaft. Using a hand held rotary tool with a sanding drum I was able to take off enough material to slide it on the alternator shaft. The pulley will then rest on the bushing allowing it to turn once the nut is tightened. The alternator will still put out 14 volts and the cooling system seems to be unaffected by the new water pump pulley. I really don't have a means of measuring performance gain so I rated it as "average."

    ki0ha

    Year: 2002 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 Jefferson City, MO

    Helpful (1) (0)

  • 4/5

    Installation Time: Afternoon

    August 19, 2013

    Great economy option

    Make sure you have all the tools before you try this, but not too difficult. Looks good under the hood and works like a charm. The alternator pulley is sized perfectly, right on the edge. At idle it produces just enough current to run the ac at max, but turn the lights on or the stereo and it starts pulling a little out of the battery. don't idle all the time with everything cranked you'll be fine. A little gain in hp and mileage. Just slows the serpentine belt down a lot, reduces that parasitic drag. Definitely a good investment. If the battery light comes on after install, check the alternator fuze. Mine was blown.

    Troyer

    Year: 1997 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Libby Montana

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    April 11, 2013

    Really helped free the engine up

    The SR pulleys really help free up horsepower that the engine had all along! and they look great! Overall very happy with the purchase. Thanks American Muscle!

    97stangGT

    Year: 1997 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 TX

    Helpful (1) (1)

  • 5/5

    Installation Time: Less than 1 Hour

    December 09, 2011

    alot better on gas

    this kit makes your uder hood look better and better on gas n i feel a more power out of it. i would recommen this to ever one...

    mex420

    Year: 1998 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 4 texas

    Helpful (2) (2)

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