It’s no secret that the 79-93 Mustangs are pretty lightweight and we all know that lighter is better but here’s a more in depth article about the fox mustang’s weight.

The very first base Mustang was just under 2,500 pounds! Compared to a 2018 GT weighing in at just over 3,700 pounds! But let’s go back to the wonder years a bit…  The 80’s Camaros weight in at around 3,200 to 3,400 pounds. The first SN95, right after the fox weighed in at 3,380 pounds for a GT manual.

So the lightest fox Mustang is a 1979 coupe at 2,550 pounds or 2,870 with a 5.0L V8 and heaviest is, as you probably already know, a GT convertible with automatic weighing in at 3,442 pounds. The earlier foxes (and I mean the first ones) had lighter K-members and other little tidbits that help make it one of the lightest Mustangs. The AOD accounts for an additional 60 pounds over the T5.

The weight distribution on foxes are generally between 56 and 59% here’s a typical chart for the fox Mustang weights.

LX 5.0 VertManual32381870136857.8/42.2
LX 5.0 VertAuto32981909138957.8/42.2
LX 5.0 NotchManual30371798123959.2/40.8
LX 5.0 NotchAuto30971837126059.3/40.7
LX 5.0 HatchManual31021796130657.8/42.2
LX 5.0 HatchAuto31621835132758/42
GT 5.0 VertManual33271923140457.8/42.2
GT 5.0 VertAuto34421960148256.9/43.1
GT 5.0 HatchManual31911849134257.9/42.1
GT 5.0 HatchAuto32511888136358/42
93 Cobra RManual31431823132058/42
93 CobraManual32551874138157.6/42.4

Drag Coefficient

The most aerodynamic foxbody is a base LX hatchback with a DC of .36 compared to a notchback’s .40 A GT hatchback is around .37.5. The first foxbody notchback had a drag coefficient of .46! Comparitivly speaking an early 80’s thunderbird had .35. The 80’s Camaro could easily slip through the air at .35 DC. You can improve the drag coefficient by lowering the car, making sure you’re not hanging the exhaust too low and keeping your tire width reasonable (what’s that?).

SlimFox – Shedding Some Weight

Ultimately you want to remove some weight up front, “quickest” way to do that is aluminium heads, fiberglass hood and tubular K-member / control arms. Moving the battery to the back helps shift over 30 pounds (but also adds weight due to the extra long cable you need). Or you could spend $600 on a 15 pound 12V Lithium-Ion Powerpack Battery. You could also remove all the sound deadening (put some dry ice all over it, should crack and come off easily), and thick insulation blankets for about 20 pounds overall.

Below is a table of possible weight savings for some of the most popular things to do:

PartWeight (lbs)ReplacementWeight Savings (lbs)
Iron heads103Aluminium heads40-50
Factory K-member50Aftermarket20-30
Factory A-arms30Aftermarket15
Spare Tire25Can of fix-a-flat24
Jack and iron8None8
AC (complete)30None30
Hood41.5Fiberglass pin on hood25.8
Hatchback insulation10None10
87-93 arm-rest6.9None6.9
Driveshaft19.7Aluminium driveshaft6
Tar like sound deadening6None6


The weight (or lack thereof) of the foxbody Mustangs is part of reason of its popularity, if you start with a lightweight notchback at just over 3000 pounds and start doing a weight saving project, you could end up with a pretty light platform to play with. Just remember to keep it safe. I’m not one to recommend cutting up door reinforcements and other things to make a street car that much more unsafe. Please share your own weight saving ideas in the comments below.


  1. Steve…awesome info…lots of work went into this
    as far as weight is concerned…wheels & tires can weigh lots or very little
    also brakes & related parts & unsprung weight is huge with the road race crowd
    would be interesting to compare the most common wheel swaps…


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