2027 Keystone RV Cougar 350LLK

Above and Beyond

Keystone Cougar fifth wheels deliver a refined collection of the most livable, full-profile floorplans at ultra-towable lengths. Standard features like MaxTurn Technology™ and Road Armor™deliver unparalleled towing control, and innovations like Climate Guard™ all-season protection make Cougar a winning choice for full-time and extended-stay camping.

Cougar Hero Edition

Introducing the Cougar Hero Edition™

Now Available on All Full-Size Cougar Fifth Wheels

Keystone RV is incredibly proud to partner with Wounded Warrior Project® (WWP) to support our nation’s brave heroes and their families. By choosing the Cougar Hero Edition™, you are helping to contribute to this meaningful cause.

Keystone RV will donate $1,000 to Wounded Warrior Project® for every Hero Edition Cougar Premium Fifth Wheel and $500 for every Hero Edition Cougar HT Travel Trailer sold at participating Keystone RV Dealers from September 1, 2025, through August 31, 2026.

Keystone RV guarantees a minimum donation of $250,000 and will contribute up to $1,000,000.

Your purchase helps ensure life-changing programs and services are available to wounded, ill, and injured post-9/11 veterans, their families, and caregivers at no cost. Your support truly makes a difference in the lives of our nation’s bravest – empowering them to thrive.

Cougar Hero Edition™ Package Includes:

• Industry Exclusive Full Body Paint Matte Finish
• Frameless Windows
• Glass Entry Door
• Blackout Rims
• Green LED Exterior Accent Lighting

Midnight Edition

Cougar Midnight Edition

The Midnight Edition is built for those who push farther. Available on all Premium Cougar Fifth Wheels, it comes in your choice of Black Onyx or Phantom Gray for a bold, commanding look. Each Midnight Edition finish is protected with KeyShield™ technology, featuring 5+ layers of BASF® automotive-grade paint engineered to stand up to the elements—delivering a coach that resists peeling, fading, and whatever the road throws at it.

Required Package Options:

• Automotive Full Body Paint - Black Onyx or Phantom Gray
• Frameless Windows
• Blackout Rims
• Anti-Lock Braking System
• Blue LED Exterior Accent Lighting-Chassis, Awning, Front Cap, and Speakers
• SolarFlex Discover™️ 440i
• 2 Dragonfly Energy Lithium-ion Batteries
• 2nd A/C

Anti-Lock Braking System

Safer and Smarter Towing

Safe towing is a priority for Cougar, we've always included features to give your customer a smoother, easier, and more reliable towing experience, and we are proud to announce that Cougar's Towing with Confidence Package just got an upgrade. All Cougar fifth wheel and travel trailer models are now shipping with Lippert's trailer anti-lock braking system. This state-of-the-art innovation combines the best of ABS and connected RV technology to deliver a comprehensive safety platform.

Additional Features

• Promotes exceptional towing safety and driver confidence
• Improves control on slippery roads and in emergency braking situations
• Integrates with trailer brakes to prevent trailer wheel lock-up
• Ready to connect to the OneControl app and Compass Connect
• App provides digital odometer, system monitoring, and more

HyperCore Composite Wall Construction

Completely Inorganic & Water-Resistant Sidewalls

• DURABILITY TESTED - Our in-house innovation lab has thoroughly tested HyperCore™
• WATER-RESISTANT - With the combination of aluminum framing and composite materials, HyperCore™ is 100% water-resistant
• LIGHTER - Between 11% - 28% reduction in wall weight depending on the size of the coach

Cougar Towing With Confidence Package

A collection of features designed to provide ultimate safety and peace of mind.

Tow With Confidence

Cougar Premium: Towing With Confidence Package

Travel with assurance with running gear and accessories designed to provide an extra measure of security.

PACKAGE FEATURES

Running Gear

• Max Turn Technology
• Lippert Axles w/ Anti-Lock Braking System
• Bronze bushings, heavy duty 1/2 shackle plates and wet bolts
• Rainier "H" Rated 16 Ply Tires w/ 8 Year Warranty
• 16" 6 Lug Wheels
• Tire Linc TPMS Prep
• H" Rated Full Size Spare Tire
• Curt Helux Series Coil Spring Pin Box
• Curt Road Armor Shock Absorbing Equalizer

Visibility Accessories

• Reverse warning lights in taillight
• 2" Accessory Hitch (select models)
• 2" Towing Hitch with 4 way plug (select models)
• Rear observation camera prep

Lippert Tire Linc® TPMS Prep

Monitor tire pressure and temperature while in transit with this easy aftermarket add-on.

Lippert Tire Linc® TPMS Prep

REAL-TIME TIRE DATA TO HELP KEEP YOU SAFE ON THE OPEN ROAD

Always on and easy to install, Lippert's Tire Linc tire pressure monitoring system (TPMS) is engineered to deliver real-time tire status updates for your RV. With Tire Linc, you’ll have the tire pressure and temperature information you need to help you achieve better fuel efficiency, longer-lasting tires and most importantly, help prevent costly and dangerous tire blowouts before they occur. Many Keystone RV models are prepped to quickly and easily install the Tire Linc Monitoring System, which can be ordered here.

SYSTEM FEATURES INCLUDE:

• Actively monitors tire pressures and temperatures in real-time
• Provides push notifications when hazardous conditions occur to prevent blowouts
• Works seamlessly with the OneControl® RV app on iOS and Android devices
• Connects wirelessly through your smartphone via Bluetooth® connection
• Repeater technology strengthens wireless signal for reliable connectivity
• Kit includes four sensors and can also monitor up to 20 tires simultaneously
• Additional sensors are available for purchase for monitoring extra tires
• Sensors come with CR1632 batteries (replaceable)
• Repeater and dock assemblies included
• Easy, do-it-yourself installation 

Four Season Camping

Best climate protection in the industry. Tested to a temperature rating up to 110°F and down to 0°F. 12V tank heaters included.

Cougar's Climate Guard Package

THE ULTIMATE IN RV WEATHER PROTECTION

For a longer and more comfortable camping season, Cougar's 2026 Climate Guard protection package is designed to keep owners comfortable in temperatures up to 110°F and down to 0°F. Available exclusively on Keystone Cougar Premium and Half-ton models.

Learn more about how Climate Guard provides year-round insulation as well as protection in cold winter and hot summer months.

BETTER CONSTRUCTION AND INSULATION FOR HOT & COLD

• Insulated gooseneck, bulkhead divider and sealed pin box (5th Wheels). Cougar fifth wheels feature a fiberglass insulated gooseneck, bulkhead divider wall, and a foam gasket sealed pin box to protect the upper deck from the elements.

EXTRA SECURITY WHEN TEMPERATURES DIP

• Heated pass-through storage (fifth wheels). A heat register is positioned behind the convenience center in the pass-through storage to prevent water lines from freezing.
• 12V electric heat pads on all holding tanks. Helps prevent holding tanks from freezing while camping and can also be used in transit.
• 30K BTU Furnace
• Heated and enclosed underbelly. Cougar's sealed Coroplast underbelly has a layer of astro-foil insulation beneath the holding tanks with a second layer of fiberglass insulation above the tanks. A heating duct runs adjacent to the water lines pumping heat around the fresh tank to prevent tanks, waterlines, and gate valves from freezing.
• Heated and enclosed convenience center.
• PEX plumbing. Resistant to corrosion, pitting, and scaling, this residential plumbing uses fewer fittings, thereby reducing potential leaks. When compared to conventional copper and CPVC lines, PEX aids with heat retention in hot water lines, and diminishes condensation in cold water lines. Perhaps most importantly, PEX plumbing has the ability to expand up to three times its diameter should water lines freeze.

WARM WEATHER COMFORT

• 18K Furrion High Efficiency Chill Cube A/C
• 15K Ducted Bedroom A/C
• 3rd A/C Prep
• Radiant foil barrier in front cap. Radiant foil reduces amount of radiant heat that can come from the units front cap during summer months.
• Tinted windows. Reflects the sun's rays to keep the coach cooler.

Take Charge of How You Camp

Cougar proudly offers SolarFlex Protect 220, 440i & 660i-L packages

SolarFlex RV Solar

Take Charge of How You Camp

Incredibly versatile and expertly designed, SolarFlex™ is redefining factory-installed solar power, exceeding customer expectations. SolarFlex™ takes the guesswork out of the equation by offering affordable, high-quality RV solar energy systems. Each package is designed to grow with you, allowing owners to easily expand their system with approved, warrantied parts available exclusively through authorized Keystone dealers. To further enhance performance, all SolarFlex™ packages can be upgraded with cutting-edge Dragonfly Energy Lithium-ion batteries—available as a factory-installed option or as an aftermarket upgrade through your dealer.

SCROLL TO THE BOTTOM OF THE PAGE FOR SOLARFLEX MANUALS, QUICK START & TROUBLESHOOTING GUIDES.

Security

Intelligently engineered by the experts at the Keystone Innovation Lab. SolarFlex uses best-in-class hardware and configuration options designed specifically for RVers. Fully integrated during the build process, SolarFlex eliminates the patchwork of an aftermarket build and is covered by Keystone’s fully transferable warranties.

Control

Monitor and optimize your solar energy in real-time using the Victron app. 

Protection

Every RV owner knows the sinking feeling of a dead battery. SolarFlex can provide continuous charge, ensuring the operation of 12V systems and avoiding battery depletion and replacement.  

Flexibility

SolarFlex offers four distinctive packages delivering different levels of solar energy. Each package is designed to grow with you—offering easy add-ons for more power collection and storage.   

Innovation Leadership

These models feature exclusive ground-breaking components and technologies from the Keystone Inovation Lab.

A Better Fifth Wheel Chassis

VIDEO HIGHLIGHTS

• Rolled 1-piece I-beams eliminate potential welded failure points
• Full-width outriggers fully support sidewall weight
• Lighter stamped steel crossmembers replace welded rod-and-angle construction
• Rotocast 1-piece tanks eliminate seamed and glued failure points
• Steel straps prevent tanks from billowing in transit and impinging on the floor
• Patented MaxTurn™ bent-tube frame design increases turning radius without welds

12V Color-Coded Wiring Standard

SMART & SIMPLE

Learn how Keystone’s EXCLUSIVE color-coded 12V wiring is different from conventional RV wiring and why it’s a better for both owners and service technicians.

• Easy-to-trace circuits help dealer service techs troubleshoot and complete repairs more quickly, saving owner’s time and money.
• Clearly labeled wiring helps savvy owners with DIY diagnosis and repair of technical issues.

4G LTE and WiFi Prep

Keystone RV Company now offers 4G LTE and WiFi prep on every model we manufacture. Our engineering and sourcing teams have developed a solution that makes it simple, easy and affordable for owners to add WiFi or cellular connectivity to your coach.

Winegard AIR 360+ Omni-Directional Rooftop Antenna

Eliminates dead spots

Every Keystone RV includes the Air 360+ antenna with wiring connecting it to a receiver plate for easy intallation of a WiFi router. This antenna receives AM, FM and over-the-air television signals, and is HDTV compatible. It also features dual 4G antennae to optimize reception, two times the signal strength, and a built-in gain low noise amplifier to minimize interference.

Winegard Gateway 4G LTE WiFi Router

Prepped and ready for installation

Stay connected while parked or while traveling. Your system is designed to work with the Winegard Gateway 4G LTE WiFi Router (GW-1000, MSRP $299). This router clicks seemlessly into place on the pre-installed wall plate and activates the 4G LTE antennae in the Air 360+. The Winegard Gateway supports HD streaming with 150 Mbps max and 4G LTE download, amplifies park WiFi, distributes you WiFi signal for up to a half mile, and offers WPA, WPA2 and WPA mixed wireless security.

MaxTurn™ Technology

MAX TURN™ MAKES TURNING AND MANEUVERING A BREEZE

Keystone fifth wheel RV owners can make tight turns more confidently with Keystone's EXCLUSIVE MaxTurn™ Technology. Developed by the Keystone Innovation Lab, MaxTurn's patented tube frame design combined with a tapered fiberglass front cap provides and additional 8" of turning radius than the standard straight tube design. MaxTurn delivers an expected turning radius of more than 95° without an expensive and difficult to maintain swivel hitch pin.

Key features include:

• Single-piece bent tube replaces a welded three-piece frame
• Eliminates need for swivel hitch pin and the maintenance that comes with it
• 8" more turning radius, more than 95°
• Greater manueverability and safety
• Protects tow vehicle from damage

Features may include:

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 5,100 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 receiver hitch w/ 4-way connector: 300 lbs. tongue weight, 3,000 lbs. GTW
• 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
• 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
• Slide-topper package
• CSA construction and seal
• Hero Edition Full Body Paint Package
• Black Onyx Midnight Edition Full Body Paint Package
• Phantom Gray Midnight Edition Full Body Paint Package

Interior:

• 5/8" one-piece DynaSpan® flooring
• Tall slide out for added comfort and head room
• Night roller shades throughout
• Residential, shaker style hardwood cabinet doors and drawers
• Lock-It decorative crown molding at wall top edge
• 5,500 BTU electric fireplace with thermostat control and remote
• Max Air exhaust fan w/ rain sensor
• Dimmable lighting: main ceiling, main slideout
• Recessed flush mount lights in main ceiling

Keystone Exclusives:

• 5-year limited frame warranty
• 3-year limited structural warranty
• 1-year limited base warranty
• MY KEYSTONE Owners Mobile App
• HyperCore™ Composite Wall Construction with Vixen Fibrogloss™ HIGH GLOSS finish
• GIGGY BOX™ 12v power wiring within a protective housing, includes battery disconnect, patented
• MaxTurn™ Technology designed in frame and fiberglass front cap, patented
• Color-coded unified wiring standard
• Tuf-Lok™ thermoplastic air conditioning duct joiners
• KeyTV™ multisource signal controller, patented
• Winegard Air 360+ Omni-Directional Rooftop Antenna

Kitchen Features:

• 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
• Flex pull-out table to be used for a desk or dining
• Pull-out trash bin
• Microwave vents to exterior

Appliances & Utilities:

• Water management center providing individual shut-off valves for all fixtures
• Power converter with auto-detect battery recognition
• (2) 30 lb. LP tanks
• Exterior LP quick connect
• 60K Tankless on-demand water heater
• Furrion 18K BTU Chill Cube
• Furrion Quick Cool 15K BTU Ducted Bedroom A/C with Heat Pump
• Foil backed, foam core air conditioning duct with Tuf-Lok™ thermoplastic joiners
• 30K BTU ducted furnace
• LED HDTV in living area 12V Bluetooth® player with HDMI ARC control, 12v USB charging centers, & exterior TV hookup
• 16 Cu. Ft. 12V refrigerator w/ dent resistant doors
• 1.6 Cu. Ft. microwave
• 21" Furrion® range w/ Piezo ignition and glass stovetop cover
• Washer/dryer prep
• LED interior and exterior lighting

Bedroom Features:

• Platinum Series 60" x 80" queen bed w/ underbed storage
• Outlets & USB on both sides of bed
• Cable TV / satellite ready
• Full wardrobe slide w/ drawers
• Full wardrobe w/ sliding mirror doors, washer/dryer prep
• LED closet rod lighting
• Dimmable lighting main ceiling
• Finished under-bed storage compartment

Bathroom Features:

• 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

Weather Protection:

• Climate Guard protection package
• Heat-deflecting white sidewalls, membrane and A/C
• Radiant foil barrier in front cap
• Remote temperature probes
• Insulated gooseneck, bulkhead divider, and sealed pin box
• Insulated slide floors
• Two roof attic vents
• Heated pass-through storage (fifth wheels)
• 12V electric heat pads on all holding tanks
• PEX plumbing

Safety:

• Breakaway switch
• GFI receptacles
• Carbon monoxide detector
• Smoke detector
• Propane gas leak detector
• Fire extinguisher

Options:

Exterior:

• Frameless, Dual-pane Windows
• Slide-topper package
• CSA construction and seal
• Hero Edition Full Body Paint Package
• Black Onyx Midnight Edition Full Body Paint Package
• Phantom Gray Midnight Edition Full Body Paint Package