The 2021 Ford Mustang Shelby GT500KR represents the modern pinnacle of the “King of the Road” legacy. This specific example began its life as a Carbon Fiber Track Pack model before undergoing extensive widebody and KR conversions. With only 1,400 miles on the digital odometer, it offers a rare opportunity to own a serial-numbered Shelby that blends daily technology with track-focused performance.
The Structural Evolution of a Widebody King
The transformation of this vehicle involved fitting a comprehensive Shelby widebody kit in 2025 to house massive 20-inch forged wheels. Every visual element serves an aerodynamic purpose, including the vented carbon fiber hood and the aggressive front splitter. These components work together with the rear wing to manage airflow while the car is operating at high speeds on the track.
Carbonized Gray paint serves as the perfect canvas for the Shadow Black stripes that run the length of the body. Furthermore, the mirror housings and rocker panel extensions utilize lightweight carbon fiber to reduce mass while maintaining structural integrity. This combination of materials ensures the 2021 Ford Mustang Shelby GT500KR looks as formidable as its performance figures suggest.
Refined Interior and Track Safety Features
Inside the cockpit, the driver is greeted by Recaro racing seats trimmed in a striking black and red leather. A bespoke roll bar has been installed to increase safety during high-speed maneuvers, reflecting the vehicle’s true racing DNA. The Alcantara-wrapped steering wheel provides a tactile grip, while the 12-inch digital display keeps the pilot informed of all vital vehicle metrics.
Technological convenience was not forgotten during the build, as the car includes the Technology Package with a Bang & Olufsen sound system. Voice-activated navigation and blind-spot monitoring ensure the 2021 Ford Mustang Shelby GT500KR remains a usable machine for more than just drag strips. A dashboard plaque identifies this specific unit as CSM #21KR0028, confirming its place in the official Shelby American registry.
Supercharged Predator V8 and Performance Specs
The heart of the 2021 Ford Mustang Shelby GT500KR is a 5.2-liter Predator V8 enhanced by a polished 3.8-liter Whipple supercharger. This setup produces a staggering 900 horsepower, supported by a high-volume intercooler and an open cold-air intake system. Power flows through a seven-speed dual-clutch transmission to the rear wheels via G-Force half-shafts and a Shelby-tuned 3-inch cat-back exhaust.
Summary of a Modern Muscle Legend
This 2021 Ford Mustang Shelby GT500KR Widebody is a comprehensive build that honors the heritage of Carroll Shelby through modern innovation. By combining the factory Carbon Fiber Track Pack with the GT500KR package, the owner created a vehicle that excels in every performance category. It remains a definitive statement for enthusiasts who demand the absolute highest level of power and exclusivity from the Mustang platform.
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Source: bringatrailer.com
