Stage IV 440 Challenger

Pull up next to this Challenger at a light and you’ll be in for a surprise. Under that bone stock exterior lies the heart of a beast – a very angry beast. Even if you pop the hood, you won’t see any difference – the beast knows how to hide. This Stage IV Challenger [...]

440 Supercharged R&D Challenger

You’ve seen some tidbits about this car, but consider this the official unveiling of our firecracker 440 supercharged R&D Challenger.

This one-of-a-kind Supercharged 440 Challenger is a test platform for a pre-production MOPAR all-aluminum 440 motor and pre-production MOPAR high-torque transmission. This car is also a test car for autmotive media and will be [...]

Supercharged Aluminum block 440 hits the Dyno!

Eddie took the aluminum block 440 R&D Challenger to Diablosport in Florida for tuning and some dyno time.

The results were 570 HP (rear wheel), which extrapolates to approximately 690 HP at the crank.

This 440 is a unique motor that we’re using to push the envelope for SpeedFactory production cars.

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900 HP SpeedFactory Challenger

This blacked-out 900 horsepower Challenger is a force to be reckoned with. It’s a 2009 “one-off” build SpeedFactory Challenger, powered by a 426 Hemi with forced induction through a Vortech V7 Ysi supercharger, passing through a Fat Cat Fabrication custom-built charge cooler. The charge cooler greatly increases the efficiency of the supercharger. This Challenger also has the new 6 speed [...]

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