Roush just blew up Ford’s own factory. The new supercharger kit for the 2026 Mustang GT and Dark Horse boosts the 5.0-liter V8 to 810 hp and 854 Nm — and that’s more than the official Mustang Dark Horse SC delivers. Quite a bit more.
But the real punchline is the price. The kit itself costs $10,399. Bolt it onto a base Mustang GT and you’re looking at an 810-hp car for roughly $58,954. Now compare that to the factory Dark Horse SC, which starts at $108,485. Almost twice the money. For less power.
The heart of the package is an Eaton TVS R2650 supercharger, co-engineered with Magnuson Superchargers and mounted in an inverted layout. That one word — “inverted” — explains the whole trick. Flipping the rotors lowers the assembly enough to slip under the factory hood line. No cowl bulge, no scoop, no visual giveaway. By forced-induction standards, this is high-end engineering theater.
The blower runs at 13 psi (about 0.9 bar) and keeps the factory dual 80-mm throttle bodies. Alongside it sit two intercoolers, a front-mounted heat exchanger, a high-flow Bosch pump, upgraded fuel injectors, CNC-machined fuel rails, new director plates, and tighter-gap spark plugs. This is serious engineering, not a screwdriver job.
And now the bad news for Ford. Roush beats the Dark Horse SC on both headline numbers: 810 hp against 795, and 854 Nm against the factory SC’s roughly 732 Nm (540 lb-ft). In other words, a tuner is doing for $10,000 what Ford is charging $100,000 to deliver. The only thing the Dark Horse SC still has going for it is the “official factory” badge. That’s it.
The bigger surprise isn’t even in the numbers — it’s in how clean the install is. Nothing in the engine bay needs cutting, relocating, or stripping. The factory K-brace stays put, the hood needs no modifications. The kit is 50-state legal and comes with a limited powertrain warranty of three years or 36,000 miles. For aftermarket forced induction, that combination is almost unheard of.
For Mustang fans, this is one of those rare moments when an upgrade reads less like a garage gamble and more like a factory path — only cheaper and meaner than the factory itself. The only real question left is whether the chassis, brakes, and rear tires can swallow 810 hp as smoothly as Roush’s price tag swallows the gap to the Dark Horse SC.
