Cat C18 ACERT engines are the ideal solution for your demanding operations in the oilfield. Decades of field operation and intense research and development allow Cat C18 ACERT engines to deliver excellent performance with low operating costs while meeting tight environmental requirements.This is an ideal engine for applications that require Tier 4 Interim or EU Stage IIIB emissions certifications in land mechanical drilling applications such as mud pump drives. Cat C18 ACERT™ Industrial Diesel Engine. Ratings: 447-522 bkW (600-700 bhp)@ 1800-1900 rpm meet U.S. EPA Tier 4 Interim, EU Stage IIIB emission standards. Rating 563 bkW (755 bhp) @ 1800-1900 rpm meets U.S. EPA Tier 4 Interim emission standards.