Talk to a Mustang Expert
Mon-Thu 8:30a-11p, Fri-Sun 8:30a-9p

Free Shipping on Everything. Seriously. Details

Flywheel Replacement Guide For 1999-2004 Mustangs

Written By: Brian Matthias

Shop '99-'04 Mustang Flywheels

If you're replacing your Mustang's clutch, you are going to want to grab a new flywheel as well. Upgrade from your current flywheel while choosing from the top brands in the industry.

Shop Flywheels

If your Mustang requires a new clutch why not upgrade your flywheel at the same time? You have many, many options available for your New Edge Mustang so grab a new, upgraded flywheel.

American Muscle

Should I Swap my 1999-2004 Mustang's Flywheel When Changing Clutches?

  • Flywheel upgrades are highly recommended to complement the purchase of a new clutch
  • A new flywheel will ensure the best engagement possible from your new setup
  • It is recommended in many cases to match your new clutch and flywheel by brand
  • The construction material of your flywheel—steel or aluminum—is largely based on your intentions and future plans for the car

Flywheels are a highly recommended upgrade to complement the purchase of a new clutch, but they’re often seen as not necessary by consumers. The truth is very much the opposite - a new flywheel will ensure you’re going to get the best engagement possible from your new setup. It will give the clutch a fresh new surface to grab rather than one that’s resurfaced, and had been used for the last 20 thousand miles plus. Replacing the flywheel when you swap out your clutch components is fairly simple and is without question worth the added peace of mind and extra performance!

6-Bolt Flywheel for 1996-1998 GT and Late 2001-2010 GT Mustangs
6-Bolt Flywheel for 1996-1998 GTs and Late 2001-2010 GTs

Should I match my Mustang’s clutch and flywheel by brand?

Most companies design their flywheels and their clutches to be used in conjunction with one another. They are machined to precise tolerances to ensure precise engagement, optimum grip, and the prevention of any premature failure. We highly recommend matching your clutch brand to its respective flywheel for the best results (i.e. Exedy clutch with Exedy flywheel).

Exedy Stage 1 Clutch Installed on a 1986 to Mid-2001 GT Mustang
Stage 1 Clutch Installed

Which is a better flywheel material for a Mustang, steel or aluminum?

Flywheels are available in one of two materials: steel or aluminum. Deciding which route to take will be based largely on your intentions for your Mustang. For a daily driven or slightly modified Mustang, you can’t go wrong with either choice. Steel is a direct factory replacement and is what most people choose for their daily driver due to its durability.

Billet Steel 8-Bolt Flywheel for 1999 to Mid-2001 GT, 1996-2004 Cobra, and Mach 1 Mustangs
Billet Steel 8-Bolt Flywheel for 1999 to Mid-2001 GTs, 1996-2004 Cobras, and Mach 1s

What flywheel will give my Mustang better performance, steel or aluminum?

Since the steel has a heavier rotating mass, the weight helps the motor start spinning easier and quicker at lower RPMs. This makes daily driving easier on both your left foot and the engine. The aluminum flywheel is typically a better option for Mustangs that make power in the higher RPM ranges. With its lighter rotating mass, it’s able to rev faster which puts the car into its power band faster.

Be careful when placing your order, and be sure to order the proper flywheel for your year/model Mustang. One way to know for sure is determine which engine/trans combination you have.

  • Valve Cover with 11 bolts and a T45 trans (check trans type on your door sticker. If the first digit is a 6 you have a T45 trans): 6 bolt flywheel
  • Valve Cover with 11 bolts and a T3650 trans (If the first digit on the door sticker is a K you have a T3650 trans): 6 bolt flywheel
  • Valve Cover with 13 bolts and a T45 trans: 8 bolt flywheel
Billet Aluminum 6-Bolt Flywheel for 1996-1998 GT, and Late 2001-2010 GT Mustangs
Billet Aluminum 6-Bolt Flywheel for 1996-1998 GTs, and Late 2001-2010 GTs

What are the advantages to an adjustable clutch cable?

In stock form, you Mustang’s clutch leaves you with limited adjustability. With aftermarket accessories, there are three main parts that help to control the clutch from the moment you press the pedal - the clutch cable, clutch quadrant and firewall adjuster. These items help to complete your clutch connection and improve your power delivery. The stock components are usually made of weak plastics, good only for daily driving. They become worn and bent over the years, and they should be replaced with stronger components. Below is a chart listing the benefits of the aftermarket options.​

Adjustable Clutch CableClutch QuadrantFirewall Adjuster
Replaces stretched out factory cableReplaces flimsy stock plastic quadrantKeeps cable in place
Improves clutch feel and reduce pedal effortImproved engagement for flex free shiftingAdjust clutch engagement point
Adjusts pedal height when combined with a quadrant
Adjust with one hand on firewall

More adjustbility over stock
1996-2004 Mustang Clutch Adjuster Kit
Clutch Adjuster Kit for 1996-2004 Mustangs

Clutches and flywheels are very important components of any manual transmission Mustang; it’s where the engine starts to put the power to the wheels. When accessorized correctly, you can take full advantage of the clutch and use all of its potential gripping power. When upgrading your system, another option would be a hydraulic clutch conversion. This would replace the traditional cable system with a modern hydraulic linkage for a smoother and more manageable clutch operation. Upgrading your flywheel or other clutch accessories, such as the adjustable clutch cable, clutch quadrant, or a firewall adjuster will give you the adjustability you’ll want and need.

Fitment includes: 1999, 2000, 2001, 2002, 2003, 2004, GT, V6, Cobra, Mach1, Bullitt