Image Credit: duPont Registry.The first-generation Ford GT is already one of America's most collectible modern supercars, but every so often, an example surfaces that stands apart even from the rest. Over at duPont Registry, one such car has just appeared for auction with an unusually rare factory specification that few enthusiasts have ever seen.At first glance, it looks almost unfamiliar. Finished in Speed Yellow without the iconic racing stripes that adorn the vast majority of Ford GTs, the clean bodywork gives the mid-engine supercar a completely different personality while highlighting its dramatic GT40-inspired design.The auction listing claims this particular 2006 model is one of just two examples produced in Speed Yellow with the factory stripe-delete option. It also received optional red-painted Brembo brake calipers from new, making the specification even rarer.AdvertisementAdvertisementWith fewer than 9,000 miles, extensive documentation, and an exceptionally well-preserved history, it's the kind of collector-grade Ford GT that rarely becomes available on the open market.A Rare Take On An American Supercar IconImage Credit: duPont Registry.Ford built approximately 4,038 examples of the first-generation GT between the 2005 and 2006 model years, with production taking place at the company's Wixom Assembly Plant in Michigan. Created to celebrate Ford's centennial while honoring the legendary GT40, the supercar combined retro-inspired styling with modern engineering and instantly became one of the brand's most desirable performance cars.Most buyers opted for the signature racing stripes that echoed the GT40's Le Mans heritage. This original owner, however, specifically requested a stripe-delete car, with the original order paperwork reportedly confirming the unique specification.Without the contrasting stripes, the GT's sculpted bodywork, flying buttresses, roof-cut doors, and massive side air intakes become even more prominent, giving the supercar a cleaner and arguably more understated appearance.Still A Serious Performance MachineImage Credit: duPont Registry.While the paint specification may be the headline, the mechanical package remains every bit as impressive today as it was two decades ago.AdvertisementAdvertisementPower comes from a supercharged 5.4-liter V8 producing 550 horsepower and 500 lb-ft of torque. The engine is paired with a Ricardo six-speed manual transaxle that sends power exclusively to the rear wheels, helping the GT sprint from 0-60 mph in around 3.3 seconds before reaching a top speed of roughly 205 mph.The aluminum spaceframe chassis, aluminum body panels, dry-sump lubrication system, unequal-length suspension, and Brembo braking package ensured the GT offered genuine supercar performance while remaining surprisingly usable on public roads.This example also features a Heffner exhaust installed in 2019, adding a tasteful performance upgrade while leaving the car largely faithful to its original specification.Collector-Grade Documentation Adds To The AppealBeyond its rarity, the car comes with the kind of provenance serious collectors value. The listing includes the original window sticker, original bill of sale, factory order documents, ownership records, factory car cover, tire inflator, and both original keys.AdvertisementAdvertisementCARFAX also shows no reported accidents, structural damage, title issues, or odometer discrepancies across its documented ownership history.Originally delivered through Davies Ford in Pennsylvania, the GT has passed through just three private owners while residing in Florida, Oklahoma, Texas, and Colorado before arriving with its current seller in Tennessee.A Ford GT Few Will Ever See AgainImage Credit: duPont Registry.Ultra-low-production specifications have become increasingly important in today's collector car market, and this Ford GT checks several of the right boxes.Being one of only two known Speed Yellow stripe-delete examples already makes it exceptionally unusual, while the optional red brake calipers and comprehensive documentation further strengthen its appeal.AdvertisementAdvertisementAt the time of writing, bidding had climbed beyond the $500,000 mark with several days remaining before the auction closes, suggesting collectors recognize just how uncommon this specification is.Whether it ultimately sets a record or not, opportunities to purchase a first-generation Ford GT configured like this are extraordinarily rare, making it one of the most distinctive examples of Ford's celebrated American supercar.If you want more stories like this, follow Guessing Headlights on Yahoo so you don't miss what's coming next.