Description
Motorsport and Performance Introduces The Apex of Performance, The Mustang RTR Spec 5. The most capable Mustang RTR ever produced — limited to 50 units per year.
The 2026 Mustang RTR Spec 5 is the ultimate expression of what RTR stands for. It’s the result of more than 15 years of pushing design, engineering, and performance further than ever before. This isn’t about chasing our peers or repeating what’s been done before — the Spec 5 is born straight from our core DNA. Every curve, every component, and every ounce of power is built to embody what it means to be Ready to Rock™. This is the most capable and modern, yet aggressive, Mustang RTR® ever offered, created for those who demand the absolute best.
Created for the street, the track, and every mile in between
RTR Vehicles is more than a performance brand. We are a company fueled by passion, competition, and the belief that driving should always be an exciting experience. For the last 15 years, our DNA has been forged through relentless innovation, proven on the track and trail through motorsport championships, and strengthened by our strategic partnership with Ford. Every RTR is rigorously tested, designed, and developed in the RTR Lab, and built to OEM+ standards that meet or exceed Ford’s own benchmarks.
Not Just Another Supercharged Mustang
Under the hood is a supercharged 5.0L V8 paired with a 3.0L Stage 2 Whipple Supercharger System, which produces over 870 horsepower and 660 lb-ft of torque. An HD Race Intercooler keeps things cool under extreme conditions. At the same time, the RTR by BORLA Cat-Back Active Exhaust System — meticulously tuned to perfection by Vaughn Gittin Jr. — delivers a sound that hits just as hard as the power it unleashes. Spec 5 can be optioned with a 6-speed manual or a 10-speed automatic transmission. Either way, you’re in command of a machine that was built to thrill.
A widebody system without compromise
The 2026 Spec 5 introduces the next evolution of RTR’s Widebody System. These aren’t bolt-on flares; this is a fully integrated system that redefines what a widebody Mustang should be. Each component has been meticulously engineered to flow seamlessly to complement the Mustang’s body lines. All mounting points are hidden beneath the surface, eliminating the need for exterior hardware to be visible. The result is a precise fit and finish so refined that it looks as if it rolled straight off the assembly line this way.
- Composite Widebody System Components: front fenders, bumper extensions, rocker panels, rear quarters with tyre cooling vents, wheel arches with ducts, and felt liners.
- Exposed Carbon Fibre Components: chin splitter, wake tower assemblies (front and rear), rocker splitters, and rear quarter splitters.
- Bespoke Fuel Door: engineered with billet arms, a laser-printed nylon bucket, and a vertical over-centre motion. It accepts all 50-state nozzles and keeps the OEM push-to-open function intact.
This system isn’t just about looks — it’s about attitude, engineering, and functionality coming together in a way only we can deliver.
Standard Components & Pricing
The 2026 Mustang RTR Spec 5 starts at £159,999, which includes the base Mustang GT 401A with Performance Package.
Powertrain Components
- 870+ HP and 660 LB.-FT. TQ 3.0-litre Whipple Stage 2 Supercharger System and HD Race Intercooler System
- RTR by BORLA Cat-Back Active Exhaust System
Widebody System Components
RTR Composite Widebody System Components
- Composite Widebody Front Fenders
- Composite Front Bumper Extensions
- Composite Upper Rocker Panels
- Composite Widebody Rear Quarter Panels with Integrated Tire Cooling Vents
- Felt Front Fender Liners
- Composite Rear Wheel Arches with Tire Cooling Ducts
- Bespoke Fuel Door with Vertical Over-Centre Motion
RTR Exposed Carbon Widebody System Components
- RTR Carbon Fibre Chin Splitter
- RTR Carbon Fibre Wake Tower Assemblies (Front and Rear)
- RTR Carbon Fibre Rocker Splitters
- RTR Carbon Fibre Rear Quarter Splitters
Exterior Components
- RTR Extended Colour Palette Standard Paint Option
- RTR Upper Grille with LED Air Intakes
- RTR Lower Grille
- RTR Corner Grilles
- RTR Undertray Extension
- RTR Hood Vent
- RTR Decklid Spoiler
- RTR Exterior Badging including RTR Grille Badge, “Spec 5” Brushed Grille Badge, RTR Brushed Front Wake Tower Badges, & RTR Decklid Badge
- RTR Extended Speed Block Graphics Package
- RTR Windshield Banner
Wheels, Tires & Suspension Components
- RTR Tactical Performance Adjustable Coilover Suspension System
- RTR Tactical Performance Adjustable Sway Bars (Front & Rear)
- Two-Piece Front Rotors
- RTR 20-inch Aero 5 Evo Forged Aluminium Wheels available in Forged Charcoal, Podium Champagne or Vapour Silver
- Michelin Pilot Sport 4S Tires (305/30/R20 Front and 315/30/R20 Rear)
- Lug Nut Kit & TPMS
Interior Components
- Serialised Dash Plaque Engraved with Vaughn Gittin Jr.’s Signature
- RTR Performance Shift Knob (Automatic or Manual)
- RTR Leather Covered RECARO Sport Seats
- RTR Floor Mats
Additional Components
- RTR Key Fob Clamshell
- RTR Puddle Lamps
- Motorcraft 5W-50 Full Synthetic Oil Change (10 quarts)
- Certificate of Authenticity
- 3 Year/60,000 Mile Warranty
Optional Upgrades:
- Premium Paint – £7,500
- Paint-to-Sample – £15,000
- RTR QuickFit Pro Harnesses (Driver & Passenger) – £1,199
Personalisation without limits
Every Mustang RTR Spec 5 owner has the opportunity to personalise their vehicle with a standard colour from the RTR Extended Colour Palette, included in the base price, or elevate it with premium and paint-to-sample options for a truly bespoke finish.
As part of the experience, each owner receives a render of their Spec 5 showcasing their chosen exterior colour alongside the three available wheel finishes. For paint-to-sample selections, RTR also provides a custom render and a physical speed shape painted in the selected colour for final approval, making the customisation process every bit as thrilling as the performance it delivers.
Exclusive to the Spec 5 is the new Extended Speed Block Graphics Package, which blends inspiration from RTR’s Formula Drift Spec 5-FD Mustangs with a pinstripe fade design printed on vinyl inspired by Creative Director Lindsay Ross’ hand-drawn sketches. Combined with brushed exterior badging on the grille and front carbon fibre wake towers, these details push the Spec 5’s modern, aggressive identity even further.
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