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Steeda Mustang Underdrive Pulleys - Mid (01-04) GT

Our Price $239.95
Market Price $275.95  
You save $36.00 (13%)
2 points

Manufacturer  Steeda Autosports

701-0003
+
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  • Product Description
  • Installation Info
  • Mustang Fitment

Steeda is the leader in underdrive pulley design for the 4.6L engines. Steeda was the first to achieve SFI approval on our underdrive pulleys for all 4.6L engines. Our underdrive pulleys are the only pulleys engineered through our unique partnership in Ford's technology transfer program to have the proper torsional vibration dampening characteristics for your 4.6L engine. No other manufacturer can make this claim.

Don't be fooled by other manufacturer's and their "state of the art" process claims. Steeda uses the latest technology directly from O.E. sources. Steeda's crank pulley is a one piece nodular iron, injection molded rubber design. Not a cheap "piggyback" design like many of our competitors use. Special rubber materials were chosen for their ability to absorb the torsional vibrations and their ability to withstand underhood temperatures.

Steeda's underdrive pulleys slow down accessory speed by about 25% reducing parasitic acccessory drag on the engine. This drag reduction results in an increase of up to 10 horsepower and increased gas mileage! Get back the horsepower and torque your belt driven accessories steal and start enjoying better performance and gas mileage today!

Notes: 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.


Mid-2001 thru 2004 Pulley
Use Part #701-0003 for GT, 701-0004 for Cobra/Mach1

1996 thru Mid-2001 Pulley
Use Part #701-0001 for GT, 701-0002 for Cobra/Bullit


2003 Mach 1 DOES NOT use alternator pulley. Crankshaft U/D pulleys in very limited surplus, order now while supplies last.

Product Benefits

  • High quality construction
  • Free up valuable horsepower
Time to Install
About 1 1/2 Hours
Level of Difficulty
Tech Recommended
Tools Needed
Shop Tools
Install Instructions
Instructions are in PDF format. Get the free Adobe PDF Reader, here.
Model Year(s)
2004 2003 2002 2001

Model(s)
GT

Transmission(s)
Manual Automatic

Product Reviews

Steeda's underdrive pulleys are a no brainer. This mod gives you 10+hp and doesn't affect drivability.

Great upgrade for bone stock 99 4.6. Smoother normal starts in first gear, noticably more pull above 3k rpm. Charging voltage 13.77 @ idle. AC works good. No dim lights. A must mod! If your not a "gearhead" would not recommend you do this your self.

First things first, installation as with all of their products has been a breeze. Basic tools anyone can rent from a parts store or would have a buddy who already has them. Extra notes though for people, apply a tiny drop of blue loctite to the water pump bolts. They are low torque but it never hurts to be extra careful!
Performance was clearly felt. It did change engine vibration and harmonics. No issues with undercharging or under cooling. And the feel while driving is substantial!

For those only buying the Crankshaft pulley by itself, the correct belt you will need is a 945K6 from autozone.

Great job to Frank and the boys at Steeda!

Bought this product from steeda back in 2004 for my 2001 GT, once installed i noticed a increase in horsepower, car revved up faster, ran much better, also noticed a bump up increase in gas mileage
recommend this product from steeda, competitors make crap pulleys
buy steeda pulleys and do it right the first time, i had that GT with the pullies for ten years and pullies were still good condition and engine running real strong

Great upgrade! No issues with charging.(Mach 1 doesn't need alt. pulley). 25 mpg on the highway with 3.55 gears.

there is nothing like watching the other manufactures drop their prices in half just to get rid of them, back when I bought these they were 190 dollars, the past few years I have noticed the prices go up, there is a reason, they do their homework, build the part and test it in their backyard, when I first put them on I drove it on the highway and my car kinda freaked out, didn't wanna accelerate a whole lot, ask my dad what was up, and he disconnected the battery and we waited about fifteen minutes and everything was back to normal, that's the only problem I have ever had, from what I see and hear on reviews on other products, I am glad I went with these.

Awsome product does what is suppose to and very easy to install. Never had a problem with the alternator not charging. I have heard other underdrive pulleys will give you issues. Highly recommend these pulleys.

works as advertised, dyno pulls before and after showed real increase in power.