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Cooler Heads PrevailThe new Pro Action small-block Chevy cylinder heads from RHS (Racing Head Service) utilize advanced airflow and cooling technology to deliver the most "out-of-the-box" power and torque available. Delivering power right out of the box, the 23-degree SBC cylinder heads feature specially designed runners and combustion chambers to maximize volume, atomization and velocity. For more information contact: RHS, Dept. LRM, 3416 Democrat Road, Memphis, TN 38118, (877) 776-4323, www.racingheadservice.com.