 The power rating of the 3524B is valid up to an elevation of or with a high altitude arrangement.A gross [net ] Cat C175-20 ACERT single block, 20-cylinder, electronic common rail injection, quad turbocharged, air-to-air aftercooled, four-stroke diesel engine powers the 797F.The power rating of the C175-20 is valid up to an elevation of or up to with a high altitude arrangement.