When your job needs a stimulation pump, we're ready. Our full line of well stimulation pumps are designed and manufactured by Caterpillar, in Caterpillar factories for single-sourcepackage confidence. WS305 well stimulation pumps are ideal for well stimulation applications using Cat 3512C (HD) engines and TH55 transmissions. Cat well stimulation pumps arebacked by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. Cat WS223 Well Stimulation Pump. Maximumpower input: 2237 bkW (3000 bhp) @ 275 rpm.