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 1. The Tru-Ram design is the result of “Speedy” Bill Smith’s years of hands-on experience, and dyno tests prove that it produces as much horsepower as a conventional tube header. Unlike steel tube headers, however, Tru-Rams do not generate excessive heat or noise, making them ideal for street rods and custom cars. To learn more about Tru-Ram manifolds visit them online at: www.SpeedwayMotors.com.