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2026 Cougar 360MBI by Keystone Rv
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If you purchase this unit, you will automatically become part of our RV Care Community. You’ll receive your Customer Care Promises card, which details our PROMISES to you.

In stock at Stone’s RV, the 2026 Keystone Cougar 360MBI is a 39-foot premium fifth wheel with a unique bonus room and loft that sleeps up to 10 people. With a shipping weight of 12,499 lbs and pin weight of 2,200 lbs, this Cougar is built for larger families who want flexible living space and room to spread out.

The 360MBI features 4 slideouts that open up the floorplan considerably. The mid-coach bonus room includes a tri-fold sleeper sofa, desk, and two wardrobes, with a loft above that adds sleeping space without taking up floor area. The rear living area features opposing slides with theater seating, a second tri-fold sleeper sofa, and a pivot hinge entertainment center that opens to a hidden pantry and cordless vacuum prep.

The kitchen island provides exceptional prep space, with a 16 cu ft 12V refrigerator, 21″ Furrion range, microwave that vents to the exterior, high-rise chef’s faucet, and black stainless undermount sink. The booth dinette features a bench seat ottoman with storage and two free-standing chairs.

The front bedroom includes a king bed with underbed storage, dresser with sliding top, full wardrobe with sliding mirror doors, washer/dryer prep, LED closet rod lighting, and bedside USB outlets. The full bathroom features a large shower with glass door and skylight, Oxygenics showerhead, porcelain foot-flush toilet, residential vanity with drawers, and linen cabinet.

Dual AC units keep things comfortable: a Furrion 18,000 BTU Chill Cube in the living area and a Furrion 15,000 BTU unit in the bedroom, both ducted, supported by a 30,000 BTU furnace and the Climate Guard protection package. Two power awnings with LED lighting, outdoor kitchen prep, full pass-through storage, HyperCore composite walls, DynaSpan flooring, MaxTurn Technology, Road Armor, Helux coil spring pin box, electric four-point auto leveling, tankless on-demand water heater, electric fireplace, Winegard Air 360+ antenna, and Rainier H-rated all-steel 16-ply tires complete the package.

Stone’s RV – your Nova Scotia Keystone Cougar dealer serving Atlantic Canada from New Glasgow and Sydney.

*Specifications are based on manufacturer data and may vary by unit. Please confirm details with our sales team prior to purchase.*

Air Conditionner

Heating System

Kitchen

Full Kitchen

Large Living Space & Separate Bedroom

Large Entertainment Systems

Lots of Storage

Main specification
New
2026
KEYSTONE RVCOUGARCougar Premium
360MBI
1560
Dimension
12349 lbs
40'
1"
floorplan
Sleeps 9+
4 Slideouts
  • Bathroom - Centre
  • Bedroom - Front
  • Kitchen - Centre
  • Living Area - Rear
  • Slideout - Bedroom
  • Slideout - Dinette
  • Slideout - Entertainment
  • Slideout - Kitchen
  • Exterior
    • Individually Engineered Structural I-beam chassis w/ stamped steel cross-members & outriggers
    • Electric four-point auto leveling system
    • Helux™ series coil spring pin box
    • Heavy duty 6,000 lbs. axles with ABS brakes
    • Heavy duty 7,000 lbs. axles with ABS brakes
    • High Performance Road Armor™ shock absorbing equalizer
    • Bronze bushings, heavy duty 1/2 shackle plates and wet bolts to extend axle longevity
    • Rainier H-Rated Tires: All-steel 16 ply tires with 8 year limited warranty
    • Custom aluminum luxury wheels and full size spare tire
    • 2" Rear accessory receiver with 300 lb. storage capacity
    • Automotive-grade painted fiberglass front cap w/ KeyShield™ protection
    • Front cap with dotless neon style LED lighting
    • High intensity LED auxiliary light for hitching
    • AlphaPLY roof membrane w/ Limited Lifetime warranty
    • Tinted safety glass windows
    • Frameless, Dual-pane Windows
    • Aluminum rear ladder
    • Rear observation camera prep
    • Reverse warning lights in taillight
    • One-piece polypropylene underbelly
    • Dual-heated holding tanks: 12v heat pads and furnace
    • Friction hinge entry door with integrated blackout window shade
    • Extra-Wide entry step with composite step treads
    • Telescoping entry handrail
    • Slam-latch baggage doors. Off-doorside split style for convenience
    • Full pass through storage with LED light strip, power outlets and TV hookups
    • Awning control switch located in storage compartment
    • Key-Alike lock system
    • Tough-ply flooring in main storage compartment
    • Oversized front storage compartment with strut assisted baggage door
    • Washable PVC sewer hose storage
    • Heavy-duty battery box for dual batteries with EZ hook-up terminals
    • Campsite convenience center for utilities that includes power tank fill
    • Easy access panel for water pump service and filter maintenance
    • Industry's best 76 gal. fresh tank capacity
    • Industry leading holding tank securement with steel cross supports and Tank Guardian strap system
    • Power Watchdog™ Safeview Smart RV power inlet: 50 amp
    • 50 Amp electric, pre-wired and braced for 3rd AC
    • Hot and cold exterior spray port
    • Campsite tuned speakers
    • Electric awning with gas strut arm with dotless neon style LED lighting
    • 2nd electric awning with dotless neon style LED lighting
    LIVING ROOM / Kitchen
    • Residential hardware and soft close hidden hinges on cabinet doors
    • Residential solid surface countertops
    • Black stainless steel undermount kitchen sink
    • High-rise chef’s faucet and sprayer
    • Booth dinette with 30" drawers and accent lighting
    • Bench seat ottoman with storage and two free standing chairs
    • Microwave vents to exterior
    Bathroom
    • Residential solid surface countertops w/ large sink
    • Residential vanity cabinet with drawers
    • Linen cabinet
    • Large shower w/ glass door and skylight
    • Dedicated shower light
    • Oxygenics® shower head and hose
    • Porcelain foot flush toilet
    • Medicine cabinet
    • Towel rack
    • Illuminated light switch
    Bedroom
    • Platinum Series 60" x 80" queen bed w/ underbed storage
    • Platinum Series 70" x 80" king bed option w/ underbed storage
    • Outlets & USB on both sides of bed
    • Cable TV / satellite ready
    • Full wardrobe w/ sliding mirror doors, washer/dryer prep
    • LED closet rod lighting
    • Dimmable lighting main ceiling
    • Finished under-bed storage compartment
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