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 Final or EU Stage IV emissions certifications land mechanical drilling equipment such as mud pumps. Cat C18 ACERT™ Industrial Diesel Engine. Ratings: 429-470 bkW (575-630 bhp)@ 2000 rpm are designed to meet U.S. EPA Tier 4 Final, EU Stage IV emission standards. Ratings 563-597 bkW (755-800 bhp) @ 1800 rpm are designed to meet U.S. EPA Tier 4 Final emission standards.