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Steeda Supercharger Pulley - 2.81 in. (03-04 Cobra)

Market Price $93.99 You Save 11% ($10.04)
Our Price

$83.95

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  • Item 16004
  • MPN# 555-3328

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Features & Details

  • 2.81" Diameter Pulley
  • Adds 4-5 PSI Boost
  • Gain Up to 60 RWHP
  • Heavy Duty Steel Construction
  • Fits 03-04 Mustang Cobra
Gain Up to 60+ RWHP. Unleash the monster hiding under your Mustang's hood by replacing your 03-04 Cobra's stock pulley for an amazing 60+ additional horsepower. Steeda's 2.81" pulley adds 4 to 5 pounds of boost in around an hour for performance you'll have to feel to believe.

Legendary Steeda Quality. Unlike other pulleys which are made from flimsy aluminum, Steeda makes this pulley from steel for superior durability. It also features weight-saving holes drilled around the center of the pulley to lower rotational weight.

Application. This Steeda pulley is designed for the supercharged 2003 to 2004 Mustang Cobra.

Note: Coupon codes cannot be applied to this product.

Technical Notes. Custom tuned Chip or Handheld Tuner and shorter serpentine belt required.

Fitment: 2003 2004 Details

What's in the Box
  • (1) Pulley
Installation Info
Will it fit my Mustang?
  • Cobra - 03, 04

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
Wow!

A must for any Cobra owner. This pulley will make you feel like you are driving a totally different car!

Helpful (12)

5/5
Just right

LOVE it. YOU MUST HAVE THE $180 TOOL TO INSTALL THIS. 450hp to the wheels now makes this an easy decision.

Helpful (7)

Overall Rating 4.9 out of 5 stars
Read All 12 Reviews

Customer Photos (6) Submit Your Photo

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6 Questions / 11 Answers

Ask a Question

do i absolutely need a tuner? I want to put this pulley on, but all the tuner options are pretty expensive, how important is a tuner for this? Can I put this pulley on with just the shorter serp belt?

dmuoio

  • NO, you have to get a tune - the added boost will likely not be compensated for by the stock computer. The pulley is the least expensive part of the whole job of upping boost. You would need a tuner and possibly a fuel system upgrade. Don't skimp - you could end up needing a whole engine if it detonates and burns pistons or throws a rod out the side of the block!

    Zyde

Show 4 more answers Helpful (1)

What size belt would be needed or what size idler pulley to make up for the slack.? (Everything stock)

JayDee

What other mods will I need in order for this pulley to work? I know I will need a shorter belt, and I have a tuner already.

Wes

  • The Steeda Supercharger Pulley will only need the belt and a custom tune to operate properly.

    AMJEFF

Helpful (0)

Does this 2.81 pulley require a fuel system upgrade?

ArmandoL

  • Depending on what fuel system components you have, you may not necessarily need to upgrade it. Though, a new tune and a shorter serpentine belt are required.

    AshleyK

Helpful (0)

What tuner ot tine do i need i wanna get this pully for my cobra but I was wondering what tuner do I need can I get it from American muscle or what one do I need or can I buy the tuner and air intake kit from American muscle

BrokeNOnE

  • With the Steeda Supercharger Pulley - 2.81 in. (03-04 Cobra), you can purchase any of the tuners that we have available on our site including the Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (03-04 Cobra) item #101200G99SE (http://www.americanmuscle.com/x4-custom-tuner-9904se.html). You don't need to get an air intake and tuner kit but that will also give you more HP!

    KevinD92

Helpful (0)

How does the installation of this under drive pulley effect the gas mileage of the vehicle???

Spike711

  • The only time it effects the gas mileage too much is when ur foot is slammed!!

    Acantu

Show 2 more answers Helpful (0)

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Customer Reviews (12) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 5 5
  • Fit 5 5



  • 5/5

    August 25, 2009

    Wow!

    A must for any Cobra owner. This pulley will make you feel like you are driving a totally different car!

    Finley

    Helpful (12)

  • 5/5

    June 01, 2011

    Just right

    LOVE it. YOU MUST HAVE THE $180 TOOL TO INSTALL THIS. 450hp to the wheels now makes this an easy decision.

    Jimmy

    Year: 2004 Submodel: Cobra

    Helpful (7)

  • 5/5

    Installation Time: Less than 1 Hour

    May 09, 2017

    Pulley

    This is definitely the best bang for your buck power gainer out there for the 03-04 cobras. I put this bad boy on in a matter of minutes and gained a ton of power! I can no longer hook in first or second, and instead of throwing me back in ny seat I'm planted back there through every gear all the way to 7k. Very impressed with the quality, and the army color green it came in is pretty cool. I would recommended this to anyone with a cobra. 12-13lbs of boost after install. Super addicting so see that guage shoot your there. Would recommend getting the pulley puller/install tool to make it easier.

    Wes

    Year: 2003 Submodel: Cobra

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 18, 2014

    A great upgrade for an 03 Cobra

    We were looking for a pretty simple upgrade to boost overall performance and this really did it. Some of the other items we have done are: A quadrant, clutch cable and adjuster.. cold air intake.. MGW shifter (it replaced the Steeda shifter that was OK, but we really like the MGW more).. OEM exhaust with FlowMaster Super 44 mufflers. Our local shop was able to pull and install the new pulley without the $180 tool. This upgrade along with the BAMA tune (we used an SCT tuner) made the car so much fun to drive all over again. It spools up way faster with more boost. I'd have to say that this is a 'must have' upgrade combined with a proper tune. Now to go order some new rear tires.. because I don't think this set will last long. What a blast.

    wnycobra

    Year: 2003 Submodel: Cobra Western, NY, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    January 31, 2014

    Asome product

    Best bang for the buck, combined with the Diablo Sport I- tune 1000 what a difference in the attitude of the car much more aggressive i love it. Terry M.

    03CobraDriver

    Year: 2003 Submodel: Cobra Morgan Hill, CA, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 20, 2013

    2.81 upper pulley

    This has been the best bang for the buck item I've put on my car. Using the Steeda pulley puller I had no problems removing the factory pulley and installing the 2.81. I used an Intune tuner to tune for the pulley, JLT CAI, and 93 octane. It builds boost quicker now and feels like a different car.

    Yellowcobra

    Year: 2004 Submodel: Cobra Yellowcobra

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 01, 2013

    A must for supercharged cobras

    By far the best and easiest mod ever. After the install and tune My car is a Beast that's ready to dominate the streets.

    Acantu

    Year: 2003 Submodel: Cobra Midland, TX, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    May 18, 2013

    a must for cobra owners

    Simple install with the correct tool. Amazing power gains when tuned. Put down 455/459 on the dyno with this pulley and an off-road x pipe. A must for cobra owners, it's like driving a whole new beast!

    KyleKleinSS

    Year: 2003 Submodel: Cobra

    Helpful (1)

  • 4/5

    Installation Time: Less than 1 Hour

    April 22, 2012

    More boost!!!

    The easiest and fastest way to get more boost from your stock supercharger is a smaller pulley. I got almost 60hp with this pulley (must be tuned).

    CobraMan510

    Year: 2004 Submodel: Cobra Richmond, CA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    September 22, 2013

    More boost

    This product really works. I have not dynoed it yet, but I did on another car and achieved a 50 hp increase. Great product, keep it coming. Thanks Tom

    1964Tom

    Year: Pre-79 Submodel: Other Rock Hill, SC, USA

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    April 29, 2013

    Awesome

    Great pulley woke up my cobra. Have to get a billet or steeda pulley puller or you will be sitting around trying to figure out how to get this thing off with any other puller. Lol

    4u2nv

    Year: 2003 Submodel: Cobra Kenner, LA, USA

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    April 24, 2012

    The best and easiest mod for your Cobra

    This pulley is the best bang for your buck if you want more horses from your Cobra. There is almost no difference to the smallest pulley in the market (2.76") in gain. You need a special tool to take the stock pulley off, you cannot find this tool in your local parts store, you can rent it online or take it to a shop which specializes in this kind of mods (renting the tool is cheaper). I recommend getting a blower tensioner with a 100mm idler to minimize slippage of the belt. You need a custom tune to use this pulley, with AM Bama tune the tensioner and other minimal mods my car is another kind of monster. A big gain for the money spent.

    d3mon

    Year: 2003 Submodel: Cobra DFW, TX

    Helpful (0)

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