2007 Holiday Rambler Sceptor 39 Quad Slide. Cummins 8.9 Litre ISL Engine, 450 Horse Power, 1,250 ft.-lb's Torque on Roadmaster / Monaco Chassis. (6) Speed Allison Transmission. Full Air Ride and Air Brakes. Full Paint. Hydraulic Levelers. Back-up Camera. Aqua Hot Hydronic Heat and Continuous Hot Water. 3 Door 18 Cu-Ft. Refrigerator/Freezer. Spacious Walk-around Bedroom . Private Head. Large Shower. Plenty of Kitchen Counter Space. Dual Opposing Couches that make into Guest Beds. Plenty of Heated Basement Storage.