The Ford Mustang RTR Spec 3 is a serialized, limited-run tuner package from Vaughn Gittin Jr’s RTR brand, and this one is finished in rare Mischievous Purple. It pairs a Whipple supercharger with the desirable six-speed manual. It sits on Cars and Bids at $10,000 with six days to go.
Cars & Bids
What it’s worth right now
The RTR Spec 3 commands a clear premium over a standard GT thanks to its rarity and content. According to Kelley Blue Book and current listings, standard 2023 Mustang GTs generally trade from the mid $30,000s into the low $40,000s, while the serialized, supercharged RTR Spec 3 package added significant cost and sits well above that.
The rare package and specification support the value, tempered by the claimed power. A low-mileage, serialized RTR build with a supercharger, and a manual is exactly what enthusiasts want, but the unverified output is a consideration. Fair value lands at $38,000 to $55,000, with $46,000 the most likely close.
Cars & Bids
Condition and details
The package is the appeal. This is a serialized RTR Spec 3 build, which adds a Whipple supercharger, RTR Tactical Performance adjustable sway bars, Ford Performance lowering springs, RTR Aero 5 wheels, an RTR body kit, and a serialized dashboard plaque, layered over the GT Performance Package with MagneRide, Recaro seats, and a Bang and Olufsen system.
Cars & Bids
The power figure warrants noting. RTR states the Spec 3 modifications raise output to 750 horsepower, though no dyno sheet was provided to confirm, so verify the figure, and the supercharger may affect emissions in some states.
Cars & Bids
The condition and history are strong. It shows just 7,800 miles with the manufacturer’s scheduled services performed, wears the striking and limited Mischievous Purple finish, and has only some chips on the front end noted, though there is a loan to pay off before the title transfers.
Cars & Bids
The offer
| Specification | Detail |
|---|---|
| Make | Ford |
| Model | Mustang RTR Spec 3 |
| Year | 2023 |
| Mileage | 7,800 miles |
| Engine | 5.0-liter supercharged V8 |
| Power | 450 hp and 410 lb.ft of torque stock, with a claimed 750 hp from the RTR package, though no dyno was provided |
| Transmission | 6-speed manual |
| Drive type | Rear-wheel drive |
| Exterior color | Mischievous Purple Metallic |
| Interior color | Black |
| Current bid | $10,000, with six days left |
Interested in this 2023 Ford Mustang RTR Spec 3? View the listing here.
What makes the Mustang unique
The sixth-generation S550 Mustang was a landmark for the nameplate, the first to feature independent rear suspension across the entire range, which transformed its handling and refinement. In GT form, its naturally aspirated 5.0-liter Coyote V8 delivered a charismatic, high-revving 450 horsepower and a classic muscle-car soundtrack, while the Performance Package added the chassis hardware to back it up. It was a genuinely capable and engaging car straight from the factory, and one with a vast, enthusiastic aftermarket.
Cars & Bids
The RTR Spec 3 package elevates that foundation into something rarer and more special. Developed by Vaughn Gittin Jr’s RTR Vehicles, a brand born from professional drifting, the serialized Spec 3 adds a Whipple supercharger for a substantial power increase, along with bespoke suspension, aero, and styling, transforming the GT into a limited-run, purpose-built performance machine. That combination of a serialized tuner package, forced-induction power, a manual gearbox, and a striking color is exactly what makes this Mustang stand apart from an ordinary GT.
My take
This is a rare and desirable tuner Mustang, and the appeal is a low-mileage, serialized RTR Spec 3 build with genuine brand cachet. The Whipple supercharger, the desirable six-speed manual, the striking and limited Mischievous Purple finish, and the comprehensive RTR suspension and styling package make it a standout, and its serialized, limited-run nature adds real distinctiveness.
Fair value sits at $38,000 to $55,000, with $46,000 the most likely result, and the crux is the claimed power figure and the modifications rather than the car’s appeal. Before bidding, seek a dyno to verify the output, confirm the emissions situation given the supercharger, review the service history, and coordinate the loan payoff. Handle that, and this is a rare, potent, and genuinely special limited-run tuner Mustang.
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.
Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission.
About the author
Kyle Edward
Editor-in-Chief, Autoblog