2025 Ford Mustang GT RTR Spec 3 for Sale With 6,500 MilesAutoblogJacob OlivaFri, September 11, 2026 at 12:39 AM UTCAdd us on GoogleAutoblog and Yahoo may earn commission from links in this article.If you thought you'd seen every flavor of Mustang, think again. This 2025 GT RTR Spec 3 is a true oddball on the auction scene, dipped in that eye-catching Mystichrome paint that can't decide what color it wants to be. Under the hood, you get the full Spec 3 treatment: a Whipple-supercharged 5.0-liter V8 cranking out 810 horsepower. With just 6,500 miles on the clock, a clean title, and all the right paperwork – including the RTR certificate and original window sticker – this one's ready to turn heads and raise eyebrows.2025 Ford Mustang GT RTR Spec 3Cars & BidsWhat It's Worth Right NowYou won't spot a 2025 RTR Spec 3 at auction every day. These specialty builds are a rare breed, and there's not much public sales data yet for the latest S650 RTRs. Still, Classic.com keeps tabs on the previous-gen (2015-2023) Mustang RTRs, giving us at least a glimpse into how these wild ponies fare with collectors.AdvertisementAdvertisementAccording to Classic.com, sixth-gen RTR Mustangs are currently pegged at a market benchmark of $42,857, with an average sale price hovering around $35,200. Good luck finding one, though – there are only a handful of comparable RTRs for sale right now, which just goes to show how seldom these cars pop up.2025 Ford Mustang GT RTR Spec 3Cars & BidsBut this car plays in a different league. It's got the latest S650 bones, the top-dog Spec 3 package, barely any miles, and that elusive Mystichrome paint. Put it all together, and you've got one of the hottest modern RTR builds out there.Condition and DetailsUnder the hood, you'll find a supercharged 5.0-liter V8, courtesy of RTR's Spec 3 wizardry. That means a Whipple supercharger, dual-pass intercooler, beefier fuel injectors, adjustable Tactical Performance suspension, sway bars you can dial in, RTR wheels, and the full body kit. RTR claims 810 horsepower, though there's no dyno sheet to back it up.2025 Ford Mustang GT RTR Spec 3Cars & BidsThe Mustang also includes the GT Performance Package, leather upholstery, a 12.4-inch digital instrument cluster, a 13.2-inch touchscreen infotainment system, LED lighting, and ambient interior lighting. It is paired with a 10-speed automatic transmission sending power to the rear wheels.2025 Ford Mustang GT RTR Spec 3Cars & BidsThe seller says the car rolled off the lot brand new in May 2025 and has been pampered ever since, with paint protection film, ceramic coating, and tinted windows. You get two keys, the original RTR window sticker, certificate of authenticity, service records, the Whipple tuner, and the RTR suspension tool. Heads up: there's still a loan on the car, but it'll be squared away when the deal closes.2025 Ford Mustang GT RTR Spec 3Cars & BidsAdvertisementAdvertisementThe OfferSpecificationDetailMakeFordModelMustang GT RTR Spec 3Year2025Mileage6,500 milesEngine5.0-liter supercharged V8Power810 horsepower (RTR claimed)Transmission10-speed automaticDrive TypeRear-wheel driveExterior ColorMystichromeInterior ColorBlack Onyx leatherLocationKamas, UtahInterested in this Mustang GT RTR Spec 3? View the listing here.What Makes the Mustang GT RTR Spec 3 UniqueRTR vehicles occupy a niche between a factory Mustang GT and a traditional aftermarket build. Created by RTR Vehicles in partnership with Ford and professional drift driver Vaughn Gittin Jr., Spec 3 models receive extensive performance upgrades while retaining a factory-like fit and finish. The package goes beyond cosmetic changes, adding forced induction, suspension upgrades, chassis tuning, and RTR-specific styling components.2025 Ford Mustang GT RTR Spec 3Cars & BidsWhat really sets this car apart is the Mystichrome paint – a throwback to the legendary 2004 SVT Cobra. For 2025, Mystichrome is back as a pricey $14,995 option, and when you pair it with the RTR Spec 3 package, you get a combo that's almost never seen, even among the wildest S650 Mustangs.Final ThoughtsThis Mustang is the best of both worlds: factory muscle meets RTR's top-tier performance. With a claimed 810 horsepower, just 6,500 miles, and a stack of documentation, it ticks just about every box for anyone hunting a modern specialty Mustang.AdvertisementAdvertisementSince there's not much sales history for the latest RTR Mustangs, this auction should give us a clue about what collectors are willing to pay for a low-mileage Spec 3. With Mystichrome paint and all the RTR goodies, this is easily one of the most distinctive seventh-gen Mustangs you'll find right now.Disclaimer: This post is for informational purposes only. We are not a dealership or broker. All vehicle specifications, pricing, and availability are subject to change without notice. We are not responsible for typographical errors, omissions, or the accuracy of the provided information. Please verify all details directly with the seller.This story was originally published by Autoblog on Sep 11, 2026, where it first appeared in the Car Buying section. Add Autoblog as a Preferred Source by clicking here.
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