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Spec Billet Steel Flywheel; 6 Bolt (Late 01-04 GT)

Item 60009G99
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      Product Information

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


      • SFI Certified
      • 6 Bolt
      • Machined to Precise Specs
      • Billet Steel
      • Fits Mid 2001-2004 GT Mustangs


      Premium Quality. When you're shopping for a new flywheel, you want a flywheel that is made to the highest standards for both performance and safety. SPEC Billet Steel 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.

      A cheaper flywheel won't stay that way - SPEC's steel 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.

      Application. This Spec Billet Steel Flywheel fits late 2001-2004 GT and Bullitt Mustangs with a six bolt main crank. This the perfect companion to your new clutch.

      Technical Note. This SPEC Billet Steel Flywheel is designed for the Mustang GT's with a six bolt main. 2001 Mustangs with production date after 06/01 have a six bolt main. Please check with your Ford dealer to determine if you have a 6 bolt or an 8 bolt main.

      Please Note. Romeo built engines have 6 bolt cranks and Windsor built engines have 8 bolt cranks. If the 8th character in the VIN is an "X" its a Windsor block, if the 8th character in the VIN is a "W" it is a Romeo block. There is an exception to that rule as the 2001 Bullitt Edition Mustang feature a Romeo built engine. If unsure please check with your Ford dealer to determine if you have a 6 or an 8 bolt main.

      Fitment: 2001 2002 2003 2004 Details

      MPN# SF64S

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (10)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 10 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • February 23, 2013

        5 2003 GT - bezel Installation Time: Shop Install Installation Cost: $100-$250

        Flywheel Review

        Excellent product. Now when i shift there is no hesitation. I can feel instant momentum. Love this product. I was actually thinking about the lightweight aluminum version but i have heard it chatters. I have no noise and maximum performance with this so im very happy.

        Helpful (4)
      • June 29, 2012

        5 2003 GT - Brooks Installation Time: Shop Install Installation Cost: $100-$250

        Excellent product

        Great flywheel. Engine revs quicker and smoother. Definitely recommend if replacing your clutch (your already in there, why not replace your flywheel!?)

        Helpful (4)
      • May 27, 2012

        5 2002 GT - Vega0611 Installation Time: Afternoon

        This flywheel is way better than any other I had ever used!!!! I love it!!!

        It took me half a day but well worth the time spend. I'm in the break in point so I haven't really put it to the the test but feels really good. The other thing I like is that is reusable can't beat that.

        Helpful (3)
      • April 27, 2012

        1 2004 GT - tduncan Installation Time: Afternoon


        Installed this myself with the help of some of my friends/coworkers at the shop, and everything seemed to fit and line up perfectly, but when it came down to the test drive, my poor pony, chattered right off the back, and now after 600 miles on it, my brand new Spec clutch is slipping worse than my stock 150,000 mile clutch was. Maybe it was a faulty part, or maybe I made a mistake, but nontheless, I was being helped by a few master mechanics so feel free to speculate. Not stoked that i'll have to pay for another clutch and flywheel though. Think this time I'll go through Ford Racing.

        Helpful (5)
      • March 24, 2012

        5 2002 GT - MT0911 Installation Time: Afternoon

        Great Flywheel For The Money!

        When looking for a flywheel - I chose this because of the quality, fit, and the fact that it has a replaceable friction plate. It is a pain to go through getting your flywheel resurfaced or dishing out a decent amount of cash on a new flywheel so having the option to just replace the friction plate is very appealing. I believe this purchase to be well worth it!

        Helpful (4)
      • March 23, 2012

        5 2003 GT - DJWheeler Installation Time: Shop Install

        Spec Steel Flywheel

        My factory flywheel had ran its course and had to upgrade the Spec steel flywheel was a great choice both for performance and cost. Along with the Spec stage 3 clutch it works seamlessly.

        Helpful (5)
      • February 24, 2012

        5 2004 GT - kris04 Installation Time: Afternoon

        spec billet flywheel

        I just recently installed my flywheel along with a spec stage 2 clutch the grip is really nice ill never buy another flywheel again perfect fit i love it the weight of it is not bad since my car is a dd. Thanks

        Helpful (3)
      • January 30, 2012

        5 2003 GT - ZincYellowGirl Installation Time: Weekend

        Bite hard

        This was our first at-home major install. Paired this with a spec stage 1 clutch and is holding up and bites hard. We opted to get the rebuildable flywheel and tackle the job ourselves instead of paying to install clutch and only resurface flywheel, so the financial load will be less next time with just having to replace friction disc. Holds up well to a full bolt/cammed/dynoed mustang gt that sees track use and powershifted every weekend

        Helpful (4)
      • October 29, 2011

        5 2002 GT - JFORCE Installation Time: Afternoon

        good price ,good product

        The spec flywheel was a nice piece with a good price . helps on the 60 ft times having a heavier flywheel to get inertia to the ground.

        Helpful (4)
      • June 05, 2009

        5 - Vinnie Santiago

        Incedible Customer Support

        I\'ve been having some severe problems with my clutch over the past couple of months. Had a shop install a setup I bought somewhere else, and they jacked it up. So I ordered the SPEC Stage 1 Clutch Kit, and the SPEC Billet Steel Flywheel. Went to install the flywheel and the mounting bolts were misdrilled from the factory. Called American Muscle on a Saturday, absolutely no hassle about exchanging the flywheel. The new flywheel was shipped out on Monday, and it was at my door early Tuesday afternoon. Got everything installed and am very pleased with this flywheel and clutch combo. Thank you guys very much for support I have not seen in a very long time!!

        Helpful (8)

      Questions & Answers (1 answers)

      1 Top Rated Question

      will this work with a centerforce clutch i have an 02 gt and a centerforce clutch im going to be using. i just purchased this flywheel but wanted to know if they can be paired. if not which flywheel is usable with my centerforce clutch.thanks

      • Yes it will work just fine

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Flywheel

      Tech Specs

      Flywheel Specifications
      Year/Model: Mid 01-04 GT Manufacture: SPEC
      Material: Billet Steel Bolt Pattern: 6 Bolt
      Hardware Included: None SFI Certified: Yes

      Will It Fit My Mustang

      • Bullitt - 01
      • GT - 01, 02, 03, 04

      Fits Manual GT and Bullitt Mustangs with a 6 bolt main only

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