Ford
Mustang FR500S (Mustang Challenge)

Why it matters

The FR500S was the Mustang Challenge race car, the one-make 'spec' series created by Larry Miller. Ford Racing built it in 2007 using what it had learned from the FR500C.

How rare is it?

Six separate kinds of rarity – never combined into one number.

Each kind of rarity is rated separately and never combined.

Production

Every figure says what it counts.

Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.

History

Seventy-seven FR500S Mustangs were built on the prototype assembly line at the Auto Alliance plant in Flat Rock, Michigan. By the start of the first Mustang Challenge race, at Atlanta, more than half of them had been sold.

Technical specifications

Engine

Transmission & drivetrain

Chassis, body & dimensions

Performance

“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.

Sources

Each number links to the exact facts it supports.

1. 1
   The Story Behind Ford Racing's Cobra Jet Level B FordMuscle · 2010-06-30

   • Seventy-seven FR500S Mustangs were built

   Accessed 2026-11-12
2. 2
   FordMuscle – The Story Behind Ford Racing's Cobra Jet Level C

   • 77 FR500S built (written as 'Seventy-seven' on the page)

   Accessed 2026-11-12