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We're so accustomed to seeing gonzo performance machinery from the speed merchants at TechArt, that more "restrained" products like their customized Porsche 911 Carrera 4 and 4S practically fly under the radar. TechArt has produced a power kit for the cars that adds 15 horsepower and increased throttle response regardless of whether you're driving a 3.6L Carrera 4 or the 3.8L C4S.

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