538/538 LL Forest Machine Engine Model Cat C7.1 Net Flywheel Power 164 HP General Forestry - HW 66639 lb View Full Specs 548 Forest Machine Engine Model Cat C7.1 Gross Power 204 HP Gross Power - 1,800 rpm 204 HP View Full Specs 558 Forest Machine Engine Model Cat C7.1 Net Flywheel Power 239 HP Gross Power 239 HP View Full Specs 568 Forest Machine Engine Model Cat C9.3 Net Flywheel Power 291 HP Gross Power 319 HP View Full Specs