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  • Ford Shelby GT500 officially rated at 500 horsepower, 25 horsepower higher than preliminary estimates
  • The Shelby GT500 will go on sale this summer with more horsepower than any previous factory-built Mustang

DEARBORN, Mich., May 2 – The most powerful factory-built Mustang ever just got even more potent. Final certification testing of the Shelby GT500’s 5.4-liter supercharged V-8 shows it will produce 500 horsepower and 480 lb.-ft. of torque – 25 more horsepower than preliminary estimates.

“With 500 hp and the Shelby name, this car is an instant legend,” said Hau Thai-Tang, director, Advanced Product Creation & SVT programs. “This is the most powerful, most capable Mustang ever.”

The Ford Shelby GT500’s supercharged 5.4-liter, 32-valve V-8 is a result of Ford’s experience in developing the modular V-8 and V-10 engine series. The engine is force-fed air via a “Roots-type” supercharger providing 9 pounds per square inch of boost. It borrows the four-valve cylinder heads, piston rings and bearings, from the Ford GT engine.

The 500 hp rating was obtained using the Society of Automotive Engineer’s latest standard and was witnessed by an objective third party. The Shelby GT500’s 5.4-liter supercharged V-8 will be built at Ford’s Romeo Engine Plant in Romeo, Mich. Pricing will be announced closer to launch.

The right to purchase the first 2007 Ford Shelby GT500 was auctioned for $600,000, with the proceeds benefiting the Carroll Shelby Children’s Foundation. The 2007 Ford Shelby GT500 goes on sale this summer.

Technical Specifications



Manufacturing location

Romeo, Michigan


Iron Block and Aluminum Heads

Intake manifold

Cast-aluminum with Roots-type supercharger and air-to-water intercooler

Exhaust manifold

Cast iron


Forged steel

Throttle Body

Dual 60 mm, electronic


DOHC, 4 valves per cylinder

Valve diameter

Intake: 37.0 mm; Exhaust: 32.0 mm


Forged aluminum

Connecting Rods

Cracked forged steel I-beams



Bore x stroke

3.552 x 4.165 in. / 90.2 x 105.8 mm


330 cu. in. / 5,409 cc


500 hp @ 6,000 rpm (SAE Certified)


480 lb.-ft. @ 4,500 rpm (SAE Certified)

Compression ratio



6,250 rpm

Idle Speed in Neutral

750 rpm

Engine control system

Spanish Oak PCM

Required fuel


Fuel Injection

Electronic returnless sequential

Oil capacity / type

6.5 quarts / Motorcraft 5W-50 Full Synthetic Motor Oil

Coolant capacity

21 quarts

Peak Boost

9 psi

May 1, 2006

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Zerin Dube

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