2026 Mustang RTR Spec 5: Bold Design, Brutal Power

RTR Vehicles has pulled back the curtain on its most aggressive and ambitious Mustang to date: the 2026 Mustang RTR Spec 5, marking the brand’s new halo performance model. Limited to just 50 units for the model year, the Spec 5 brings a full suite of styling, aerodynamic, and mechanical upgrades that push the S650 Mustang into uncharted territory.

Heart and Soul: Engine & Performance

Under its sculpted hood, the Spec 5 houses a supercharged 5.0-liter Coyote V8 using a 3.0-liter Stage 2 Whipple supercharger, pairing it with an HD race intercooler and fueling for maximum output. The result is a staggering 870+ horsepower and 660 lb-ft of torque. Buyers have the choice of a six-speed manual or 10-speed automatic transmission. The exhaust growl comes via an RTR-tuned Borla active cat-back system, tuned in part by Vaughn Gittin Jr. himself.

Chassis, Suspension & Brakes

To match the ferocious power, RTR installed its Tactical Performance Suspension System: 30-way adjustable coilovers, custom springs, and front/rear adjustable sway bars. Stopping power comes from upgraded two-piece front rotors and Brembo calipers (six-piston front, four-piston rear) to keep pace with the supercharged V8.

Exterior: Aero, Widebody & Carbon Accents

This is the first RTR Mustang to roll out a fully integrated widebody system — not mere bolt-on flares but composite panels that seem to flow from the factory chassis. Complementing that are exposed carbon fiber aero bits: front splitter, rocker extensions, wake towers, and rear splitters. Venting, cooling ducts, and a bespoke vertical-motion fuel door all contribute to the car’s functional aggression.

Inside: Driver Focus & Signature Touches

The cabin is detailed in RTR-wrapped Recaro sport seats combining suede, leather, and accent stitching. Each car carries a serial dash plaque with Vaughn Gittin Jr.’s signature. A highlight is the inclusion of the Electronic Drift Brake (co-developed with Ford), giving the driver official drift control via a lever.

Behind the Badge: Production & Pricing

RTR is offering the 2026 Spec 5 at a starting price of $159,999, which includes the base Mustang GT 401A with the Performance Package. With only 50 units produced for 2026, each example becomes an exclusive collector’s play — a halo car designed for those who demand extreme performance, flair, and custom identity.

The 2026 Mustang RTR Spec 5 is not just Mustang plus parts — it’s a statement. RTR hasn’t followed; it’s carved its own path, merging Ford’s muscle heritage with drift-rooted bravado and bespoke engineering. The result is a road car that blurs lines between daily driver and drift monster, giving enthusiasts a rare opportunity to own something truly extreme.