The Cavalry underwent numerous changes over its lifetime. Known variants are described below.

Mid 2006 to mid 2007

The original model for the Classic Muscle was likely created sometime in early 2006. It appears in the 2006-06-29 Black 2 build, as well as the 2006-11-13 and 2007-02-22 Burnout 5 builds. It was also used in promotional materials for Burnout 5, including in a flyer which came with some copies of Burnout Dominator.

Front view of the Classic Muscle in Black 2.
Rear view of the Classic Muscle in Black 2.
Front view of the Classic Muscle in Burnout 5 (2006-11-13 build).
Rear view of the Classic Muscle in Burnout 5 (2006-11-13 build).
Front view of the Classic Muscle in Burnout 5 (2007-02-22 build).
Rear view of the Classic Muscle in Burnout 5 (2007-02-22 build).
The Classic Muscle featured in a pre-order ad for Burnout 5.

Mid 2007

At some point between February 22 and July 18, the Classic Muscle's design was changed. Like the final model, the new design's front is based on a 1969 Pontiac GTO; however, unlike the final model, the rear has clear inspiration from a 1970 Plymouth 'Cuda. Based on the available timeframes, it is likely the "'Cuda Cavalry" design was short-lived.

Side view of the 'Cuda Cavalry at a developer meeting.
Rear view of the 'Cuda Cavalry at a developer meeting.
Rear view of the 'Cuda Cavalry at a developer meeting.

Late 2007

By August 17, the 'Cuda Cavalry design had been replaced by the final design. Despite this, in promotional screenshots of the game, the Cavalry is clearly branded as a Carson vehicle.

Front view of the Carson Cavalry.
Rear view of the Carson Cavalry.
Rear view of the Carson Cavalry.
Rear view of the Carson Cavalry in-game.