Dodge’s gutsy Challenger SRT8 is powered by a 6.1-liter V-8 and leaves the factory with 425 hp under the hood. If that’s not enough for your tastes, stop by SpeedFactory’s stand at November’s SEMA show in Las Vegas. They claim that their modified Challenger puts out close to 700 horses.
Laying the groundwork for such output is an all-aluminum block from Mopar (the factory block is iron), a new aluminum head, and forged engine internals. SpeedFactory then bores and strokes the engine to a whopping 7.2 liters (for a nostalgic 440 cubic-inch displacement) and straps on a centrifugal supercharger. With 91-octane fuel, SpeedFactory asserts a 700-pony output at the crankshaft, or 570 hp at the rear wheels.
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