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Peaker Services, Inc. (PSI), sometimes referred to as “Peaker” or “PeakerBuilt”, has grown to become a leader in the field of engine remanufacture, catastrophic repair, engine control and monitoring systems for the railroads. Achieved through reduced downtime, state of the art equipment, customer communication. We can also upgrade your investment with improved fuel efficiency applications, engine monitoring, diagnostic and data analysis feedback. The recent acquisition of Energy Conversions, Inc. (ECI), adds the expertise of dual fuel and spark ignited natural gas diesel engine conversion.