Well stimulation operations in the oilfield are complex and demanding. The 3500 engine family for well stimulation operations was specifically developed to meet the highest standards in performance, durability, and reliability. Cat engines are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. 3512B engines, with ratings: 1491-1678 bkW (2000-2250 bhp) @ 1900 rpm meet U.S. EPA Marine Tier 1 equivalent and U.S. Non-road EPA Tier 1 equivalent emission standards. They are available using U.S. EPA and EU Flexibility, and for other regulated and non-regulated areas.