Meet the ultimate King of the Road: a 900-horsepower Shelby GT500KR, ultra-rare, supercharged, carbon-clad, blue-striped menace that looks outrageous and sounds absolutely unhinged.
Overview
SBX Cars is proud to offer for sale this 2021 Ford Mustang Shelby GT500KR showing just 8,340 miles on the odometer at the time of this cataloging. Finished in Ford Racing Blue with white accent striping over a two-tone black and blue leather interior, this Shelby-enhanced S550 Mustang is offered with the manufacturer’s digital window sticker, a clean CARFAX report, and a clear title.
Extreme performance and unparalleled exclusivity are two of the things that Shelby American has excelled at for over 60 years, ever since the company first started partnering with the Ford Motor Company. When Shelby engineers got their hands on the S550-series GT500, they created what became known as the “King of the Road” – and the name was fitting for a long list of reasons. Between 2020 and 2022, only 60 GT500s per year received the coveted “KR” treatment, which included the installation of a 3.8-liter Whipple supercharger to go with the already-powerful Predator V8.
This muscular Racing Blue supercar, bearing CSM number 21KR0037, comes with carbon fiber exterior and interior trim, a Magneride suspension, and beefy Brembo brakes. But it also carries special provenance in addition to its impressive spec sheet: The engine bay was signed by two of Shelby American’s prominent figures: Gary Patterson, President, and Kash Singh, marketing manager and professional driver.
The car has been Ford-serviced and enthusiast-owned, showing accident-free history and tidy finishes both inside and out. Boasting 900 eager horsepower, a Borla-engineered exhaust system, and track-ready Michelin tires, this GT500KR is potent enough to get just about anyone into trouble if they aren’t careful enough. But for those adventurous enough to take the reins, it’s an exclusive, low-mileage pony car that looks, drives, and sounds just like a King of the Road should. It would make a royal addition to any car collection.
Specifications & Options
Exterior
- Ford Racing Blue
- White over-the-top striping
- HID projector headlights
- Shelby packaging
- Carbon fiber front splitter
- Vented carbon fiber hood
- Wing with Gurney flap
- Carbon fiber diffuser
- LED sequential taillights
- Quad exhaust outlets
- “KR” badging
- 20-inch Shelby one-piece 6061-T6 forged wheels
- Brushed finish
- Michelin Pilot Sport 4S tires
- 305/30 front
- 315/30 rear
Interior
- Black and blue leather upholstery
- Recaro front bucket seats
- Contrast stitching
- Shelby GT500KR logos
- Harness pass-throughs
- Remote entry and push-button ignition
- Ford Performance-branded door sills
- Alcantara-wrapped multifunction steering wheel
- Paddle shifters
- Power windows with one-touch up/down
- Cruise control
- Ambient lighting
- Dual illuminated vanity mirrors
- Dual-zone automatic climate control
- Dash plaque showing CSM number 21KR0037
- Carbon fiber trim
- Infotainment
- SYNC 3 software
- Eight-inch touchscreen
- Rearview camera
- Bang & Olufsen 12-speaker audio system
- Voice-activated navigation
- Aluminum pedals
- Floor mats
- Instrumentation
- 12-inch configurable center display
- 220-mph speedometer
- 8,000-rpm tachometer
- Dash-mounted gauges
- Oil pressure
- Oil temperature
Mechanical
- 5.2-liter Predator V8
- Hand-assembled
- Engine oil cooler
- Modified by Shelby American
- Shelby Updates:
- 3.8-liter Whipple supercharger
- Revised air intake system
- High-volume intercooler and heat exchanger
- Rated at 900 horsepower
- Seven-speed dual-clutch automatic transmission
- Launch control with Line Lock
- Torsen limited-slip differential
- Shelby by Borla cat-back exhaust system
- Magneride damping system
- Height-adjustable springs
- Caster-camber plates
- Revised sway bars
- Four-wheel power disc brakes
- Brembo six-piston front calipers
- Brembo four-piston rear calipers
Service History
The CARFAX report shows service at Planet Lincoln in Dallas in May 2024. Additional services included an antifreeze check, brake check, drive belt, maintenance inspection in April 2023. There are said to be no outstanding mechanical needs at this time.
Condition & Reports
The CARFAX report classifies this as an accident-free, damage-free vehicle with ownership in Oklahoma, Texas, Nevada, and Montana. The seller has provided a photo gallery as well as a series of videos showing a drive-by, an interior ride-along, an exterior walk-around, and a cold start.
This 2021 Shelby is said to be free of substantial imperfections.
Included in the Sale
- Ford assembly initial window sticker (digital version)
Summary
This 1-of-60 King of the Road was aptly named. It’s a supercar that seamlessly blends extreme performance, refined handling, and limited production into an exclusive vehicle that wears the Shelby American name with pride. Few people will ever experience it, and even fewer will get to own one.
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Descriptions, commentary, or observations are offered in good faith and represent general, non-expert impressions only. We do not verify or guarantee vehicle condition, mileage, or history, and this information should not be interpreted as a professional inspection or evaluation. Vehicles are not subjected to formal inspections unless explicitly stated.
Vehicle videos are typically recorded with standard equipment, so audio quality may vary, and engine or exhaust sounds may differ from how they are perceived in person.
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Buyer's Premium
The Buyer’s Premium will be added to the final sale price and is payable directly to SBX Cars. Sales tax applicability will be determined by buyer's location.
- Buyer's premium: 5%
Bid History
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