Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $15,000!! Enter Now
Coronavirus: We are Open For Business, Prioritizing health and safety Learn More

Spec Billet Aluminum Flywheel; 8 Bolt (99-Mid 01 GT; 96-04 Cobra; 03-04 Mach 1)

Item 60013
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $393.99 You Save 11% ($43.44)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • SFI Certified.
      • 8 Bolt.
      • Machined to Precise Specs.
      • Billet Aluminum.
      • Fits 99-Mid 01 GT, 96-04 Cobra, and 03-04 Mach 1.


      Race Ready. When you're shopping for a flywheel for your Mustang GT, your Cobra, or your Mach 1, if you're serious about shaving precious tenths off your laps a billet aluminum flywheel is a must-have for quick shifts and class-winning times. SPEC's Billet Aluminum flywheel is pounds lighter than your stock flywheel, delivering your peak horsepower faster for quicker starts and faster shifts.

      Premium Quality. When you're adding a new flywheel to your Mustang, you want a premium quality part that will deliver both performance and durability. SPEC Billet Aluminum Flywheels are machined to a .001 tolerance (other brands are only made to .01) and designed and weighted for the perfect balance and surface to complement your new clutch.

      Protects Your Investment.
      When replacing your clutch you have two options: resurfacing your flywheel, or getting a new flywheel. Most times, getting a new flywheel is better than resurfacing, as the flywheel will dictate how well your clutch will perform, as well as how long it will last.
      Rebuildable. A cheaper flywheel won't stay that way - SPEC's aluminum flywheels have a replaceable steel friction plate which makes this flywheel rebuildable. And this flywheel surface is also made from a special type of steel specifically designed to help your new clutch "bed in" properly and to promote superior grip - so this might just be the last flywheel you ever have to buy.

      SFI Certified. If you're using this flywheel in high performance or racing applications, SFI Certification is critical so you can run your Pony at the track or strip. And it's great for peace of mind even in a daily driver - at higher RPMs, stock cast flywheels have been known to explode.

      Fitment: 1996 1997 1998 1999 2000 2001 2003 2004 Details

      MPN# SF84A

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (17)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 17 customers

      Installation Time: Afternoon

      • March 27, 2018

        5 1999 Cobra - JohnP Installation Time: Afternoon

        Spec flywheel

        Very happy with the product 3rd mustang I’ve owned that I have installed it In. Have had nothing but good luck with it. Highly recommend it..

        Helpful (4)
      • September 25, 2017

        5 1999 GT - p1jrevely Installation Time: Afternoon

        Spec Billet Aluminum Flywheel

        Some adjustment of driving technique required vs stock flywheel. Takes all of one time releasing the clutch to figure out. Give it a little more rpm and no issues. I have a daily driver. No issues with having an aluminum flywheel. Only warning would be stop and go traffic where you frequently only move a couple feet then stop. The extra rpm to get the car moving while not hard to do, it gives the impression of constantly racing the engine. Still in clutch break-in period. However I can feel a difference in acceleration in 5th. Much easier from 1000 rpm on up.

        Helpful (6)
      • March 22, 2017

        5 2001 GT - Flipper

        Good Part

        Its a Flywheel how do you Review a Flywheel Well lets say if the part is manufactured Properly and no problems from shipping Damage you should have a nice part when you take it out the Box.Install with No Trouble and works properly yes its a good part.

        Helpful (6)
      • March 27, 2016

        5 2000 GT - jnelson Installation Time: Afternoon

        Billet aluminum flywheel

        Great flywheel. Bought an exedy clutch smoother power. Works great no vibration at high rpm's.

        Helpful (8)
      • December 16, 2014

        4 2004 Mach 1 - Gaber1987 Installation Time: Full Day

        The product itself is easily installed

        High quality product, install instructions would be good for novice car enthusiasts

        Helpful (6)
      • June 27, 2012

        5 2004 Cobra - TeePee Installation Time: Less than 1 Hour

        Spec Billet Aluminum Flywheel(8 bolt) & clutch install

        Installed clutch and flywheel in just a little over an hour with no problems.

        Helpful (5)
      • February 15, 2012

        5 2003 Mach 1 - Jared289 Installation Time: Afternoon

        Just Awesome

        If you are going to replace your flywheel then you have to choose this one. It made such a huge improvement i am in no way unhappy with this product.

        Helpful (4)
      • January 30, 2012

        5 2003 Mach 1 - Ford390 Installation Time: Weekend

        Loose Weight

        I wanted to take out the old to see what all I truly needed. My fly wheel needed turned, my schedule makes it impossible to get to the closest shop to drop off and then pick up. Thats the line I used with my wife. American Muscle came through, I recieved the new parts for the next week end. Thanks American Muscle. Thats free shipping by the way. I added the Spec 2 clutch. I have the fire wall adjuster, the feel of the new clutch is great, pedal effort is easier than stock. The iron fly wheel that came off just about cracked the floor, the Spec I put on with one hand. Serious weight loose, I would have weighed the two, but needed to keep peace in the house with the boss. I owe her a new carbage disposal. Make sure you put the dowels in from the back of the fly wheel with a punch. Great product, engine revs faster. The ablitiy to change the friction plate will make next time great, just order from American Muscle.

        Helpful (6)
      • January 27, 2012

        4 1998 Cobra - jojo Installation Time: Afternoon


        Great product, and seems to be a quality piece, only draw back is the flywheel did not come with the dowel pins for the pressure plate, would be nice to have new ones but oh well.

        Helpful (5)
      • June 30, 2011

        5 2004 Cobra - Rich

        Spec alum flywheel

        Goes great with the spec stage 3 clutch. Goes through the gears with no hesitation. Pedal feels the same but with a clutch adjuster installed, you can have it engaging by barely pushing the clutch pedal down.

        Helpful (6)

      Questions & Answers (7 answers)

      5 Top Rated Questions

      What is the weight difference between this and your stock flywheel in a 1998 cobra

      • The stock 1998 Cobra flywheel will weigh about 23lbs whereas the Spec Billet Aluminum Flywheel - 8 Bolt (96-04 Cobra, Mach 1; 99-Mid 01 GT) is 14lbs.

      Helpful (4)

      what are the torque specs on the flywheel insert

      • You will want to torque the bolts to 85 ft/lbs.

      Helpful (1)

      Will this Flywheel work with Ram Clutches - 98951HDT ? I own a 1999 Mustang Cobra

      • This is not compatible with RAM clutches.

      Helpful (0)

      Is this flywheel interchangeable between the 10 1/2 inch clutch and a 11 inch clutch?

      • This flywheel will work with the Spec clutch kits

      Helpful (0)

      Where can I find the dowel pins for this flywheel?

      • You can use this link to get the dowel pins and bolts.

      Helpful (0)
      Post Your Question
      2 More Questions
      Will this flywheel work with a McLeod clutch 1 answer
      Does this flywheel come with dowel pins if not are they necessary? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Flywheel

      Tech Specs

      Flywheel Specifications
      Year/Model: 99-Mid 01 GT, 96-04 Cobra, and 03-04 Mach 1 Manufacturer: SPEC
      Material: Billet Aluminum Bolt Pattern: 8 Bolt
      Hardware Included: No SFI Certified: Yes

      Will It Fit My Mustang

      • Bullitt - 01
      • Cobra - 96, 97, 98, 99, 01, 03, 04
      • GT - 99, 00, 01
      • Mach 1 - 03, 04

      Fits Manual 99-Mid 01 GT, 2001 Bullitt, 96-04 Cobra, and 03-04 Mach 1 Mustangs with a 8 bolt main only

          Related Mustang Categories