2006 Monaco Signature Castle IV, 2006 Monaco Signature Series Castle IV 45 Series w/4 Slide Outs, Low Miles, One Owner, 600 HP More information to follow. In the meantime if you would like more information give us a call or send us an email. Thanks!! More information to follow. In the meantime if you would like more information give us a call or send us an email. Thanks!!2006 Monaco Signature Series Castle IV 45 Series w/4 Slide Outs, Low Miles, One Owner, 600 HP CumminsRoadmaster Chassis w/10 Air Bag & Shock SystemAllison 6 Speed TransmissionFull Body PaintEngine BrakeGirard AwningsAutomatic Air Leveling SystemOne Piece Fiberglass RoofHeated/Power MirrorsAdjustable Accelerator & Brake PedalsSmart WheelAladdin System2800 Watt InverterAqua Hot Water SystemTriple Roof Air