Roush’s modified Mustang packs more power than the Challenger SRT Hellcat.
Right now, the most powerful Mustang you can buy from Ford is the GT350 with 526 horsepower and 429 lb-ft of torque. With that level of power, the GT350 is no slouch, but it still can't compete with the Dodge Challenger SRT Hellcat, which has a monstrous 707 hp under the hood. If you can't wait for the 2020 Shelby Mustang GT500 to arrive, which is rumored to have 720 hp and 650 lb-ft of torque on tap, Roush has a solution.
The 2019 Roush Stage 3 Mustang adds an Eaton R2650 supercharger with a custom inlet to the Mustang's 5.0-liter V8 to crank up the power output to 710 hp and 610 lb-ft of torque just like the JackHammer revealed a few months ago. Compared to the stock Mustang, Roush's Stage 3 Mustang has an extra 250 ponies under the hood.
To help the car cope with all that extra muscle, Roush's Stage 3 kit also includes a new set of coilovers available with three-way adjustability, a new set of 20-inch alloys, an optional adaptive exhaust system, an aero kit, and a sport interior package. Roush is currently accepting orders for the package, but it comes at a hefty premium.
On top of the price of a stock 5.0-liter Mustang, the RS3 package will start from $22,925, including a 3-year/36,000-mile bumper-to-bumper warranty and a 5-year/60,000-mile powertrain warranty. That's a total cost of at least $58,115 if you're also going to buy a new Mustang GT, which makes this option slightly more expensive than a Shelby GT350. Unfortunately Roush has only released one image of the 2019 Stage 3 Mustang so we've included images of the similarly powerful JackHammer for your viewing pleasure.