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X- or H-PipeAside from adding a nice rumble to your Ford, a high-flow aftermarket X- or H-pipe will increase power and torque on stock and modified engines. There are a few manufacturers making exhaust parts, some for street and some for racing (without cats). Stock vehicles can gain as much as 15-20 horsepower and equal torque, while gains might be event bigger with modified engines. View Related Article
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