2020 Cornerstone



This is the best- selling model in the Cummins X engine category for a reason: pure luxury. With style sharpened and opulence intensified, this carefully crafted vehicle will have you riding in ultimate refinement and exquisiteness. Unparalleled magnificence pours from this motorcoach as it handles the road ahead with grace and splendor.


Product Video


Ward = wardrobe

Lav = bathroom sink

Med = medicine cabinet

Ohc = overhead cabinets

Fridge = refrigerator

Micro = microwave

Exterior Graphics

Standards & Options


Chassis Spartan K3 raised rail chassis
Engine Cummins 15 liter X15 turbocharged 605HP engine 1,950-lb. ft. torque at 1,200 RPM
Transmission Allison 4000 MH 6-speed transmission
Engine Block Heater 1,500 watt engine block heater
Front Suspension Independent front air suspension
Rear Suspension Dana rear suspension
Front Axle Reyco Granning IFS independent 20,000-lb. front axle and air suspension
Rear Axle Dana rear axle 20,000-lb., tag axle 14,000-lb.
Rear Axle Ratio 4.30 rear axle ratio
Hitch 20,000-lb. hitch with 7/4-pin plug
Tag Axle Reyco Granning passive steer tag axle and tag axle air dump
Leveling System Valid air leveling system with auxiliary air compressor
Radiator Side-mounted radiator
Braking System All-wheel ABS disc brakes
Engine Brake Three-stage engine brake
Traction Control Automatic traction control
Shocks Bilstein shocks- 60MM front & 46MM rear/tag
Fuel Tank 150-gal. fuel tank (dual fill)
DEF Tank 15-gal. DEF tank (dual fill)
Tires Michelin 365/ 70R 22.5" tires (front) and 315/80R 22.5" tires (rear)
Turning Radius 55-degree turning radius
Chassis Battery Chassis batteries 2-12 volt
Alternator 210-amp alternator
Air Connection Remote air connection
Tow Air Brake System Safehaul tow air brake system
Tire Pressure Monitoring Tire pressure monitor system


Frame X-bridge frames welded into chassis frame
Underbelly Heated basement storage area
Insulation Insulation with reflective Flexfoil floor (R-33), roof (R-24), sidewalls (R-16), front and rear caps (R-22)
Floor 2" x 4" floor truss construction
Floor Decking 3/4" 7-ply plywood main floor decking
Walls Aluma-Tru superstructure construction on 12"-16" centers
Exterior Walls 2- 1/2" exterior wall with welded tubular aluminum construction and high-gloss, gel-coat fiberglass
Slideouts Flush-mounted electric-powered slideout rooms with both VegaTouch and separate rocker switch controls
Roof One-piece fiberglass roof with 3/8" plywood decking and 4" arched aluminum roof truss
Front Cap Steel-reinforced front cap and windshield frame

Heat, AC, Water & Power

Heating System Aqua-Hot 450 diesel hydronic water and heating system with in-floor heat throughout and engine preheat
Air Conditioning 15,000-BTU low profile A/Cs (3) with heat pumps and condensation drain system
Electrical Hookup 50-amp power cord with electric reel
Generator Onan 12,500-watt diesel generator with auto gen start, on powered slide-out tray
Inverter 3,000 watt pure sine wave inverters (2)
Batteries L16 AGM batteries (4), (6v/390 amp hrs. ea.)
Power Management Premium surge protector transfer switch
Water Hose w/ Electric Reel Water hose with electric reel
Black Holding Tank Sprayer Black holding tank sprayer
Black Tank Management Macerator holding tank dump system with electric gate valves, & manual back-up system
Water Monitoring Trutank ultrasonic tank monitoring system displayed on VegaTouch screen
Water Filtration City and tank water filtration system
Winterization Drain System Winterizing drain system


Stainless Steel Accents Executive Bus Armor 10" stainless steel trim
Clearance Accent LED lit chrome clearance accent light
Exterior 3M front protective film mask
Headlights LED high and low beam headlights
LED Fog Lights LED fog lights
LED Lights LED marker lights, turn lights, accent lights and license plate light
LED Docking Lights LED docking lights
Keypad Handle Lighted grab handle with keypad system
Door Awning Girard power entrance door awning with LED lights
Window Awnings Girard Ultra window shade awnings
Patio Awnings Roof mounted Girard Vision dual pitched patio awnings with LED lights
Mirrors Chrome, heated, remote control, Ramco side-view mirrors with blind-spot indicators
Windows Hehr frameless, tinted, dual-pane, safety-glass windows
Exterior Entertainment Samsung 40" 4K UHD Slim, Smart TV and Bose Solo 5 sound bar on TV bracket with extend, tilt and swivel arm
Utility Center Exterior heated utility center with 5" Firefly system monitor panel
Cargo Features Power slide-out cargo trays; 2.8 cu. ft. exterior Dometic refrigerator/ freezer on slide-out tray
TV Antenna Winegard Rayzar automatic powered TV antenna
Engine Door Power engine door with manual override
Rear Mudflap Full-width rear mudflap, with chrome "Cornerstone" nameplate
Slideout Awnings Girard Ultra slide-out awnings
Satellite Dish - CA Winegard Trav'ler satellite dish Shaw TV - standard w/ CSA option
Satellite Dish - US Winegard Trav'ler satellite dish DIRECTV - standard w/ USA option


Visors & Privacy Shade Power front sun visors and privacy shade
Windshield Ultra-Vision one-piece wrap-around tinted windshield
Driver / Passenger Seats Villa 6-way power, lumbar, air cooled, heated, leather driver and passenger seats with integrated seatbelt
Start Push button start
Steering Wheel E-Z Steer electric, adjustable power steering assist; VIP wood-grain, leather-wrapped, tilt and telescoping steering wheel with integrated controls for cruise and wipers
Dash Valid 15" digital dash with selector knob and three selection main screens
Monitoring System(s) Blind spot monitoring system displayed on digital dash screen
Infotainment System(s) Glass panel, dual 9" touchscreen in-dash infotainment center with Rand McNally RV navigation, Bluetooth, Sirius XM, AM/FM tuner, integrated camera control, house mode whole coach audio distribution, and integrated VegaTouch coach control
Sound System JBL premium audio sound system with amplifier, speakers and DVC sub-woofer
Pedals Power adjustable brake and accelerator pedals
Cameras Xite 360 camera system that displays on digital dash screen
Additional Amenities Two dual USB ports and 12v socket for charging


Lighting System 10" VegaTouch touchpad system, for complete integration of coach controls/ mobile app control also
Lighting Premium LED 12V recessed ceiling lighting
Flooring Hand laid 16" x 32" porcelain tile floor
Window Treatments Powered solar day and black out night shades
Television - Living Room Samsung 50" 4K UHD Smart TV
Television - Front Overhead Samsung 32" LED Slim 1080P Smart TV in front overhead
Sound - Living Room Bose SoundTouch 300 sound system with wireless surround sound speakers
DVD Systems Samsung HD Blu-ray player
Furniture Villa Italian leather furniture
Washer/Dryer Whirlpool stacked washer and dryer
Central Vacuuming System Central vacuum system
Electric Fireplace LED lit fireplace with 1500w heating element (45B and 45Y)
Interior Doors Aire-Secure travel locks for all pocket doors


Kitchen Countertops Quartz countertops with stainless steel sink and dimmable LED accent lighting
Waste Basket Large deep drawer for waste basket with easy access trash chute (trash chute not available in 45F)
Dishwasher Dishwasher with wood raised panel door front
Cooktop Induction cooktop with matching wood cover
Microwave Whirlpool Gold 1.9 cu. ft. convection microwave oven
Refrigerator Whirlpool stainless steel residential refrigerator with ice maker and water dispenser
Vent Maxxair power exhaust vent fan


Television Samsung 32" LED Slim 1080P Smart TV
Sound Bose Solo 5 sound bar
Bedroom Mattress / Bedding Select Comfort Sleep Number king size mattress
Nightstands Nightstands with USB ports and quartz tops
Ceiling Fan Ceiling fan
Bedroom Wardrobe Large cedar-lined wardrobe with LED lit, motion activated closet rod
DVD Systems Samsung Blu-ray player


Bathroom Countertop(s) Quartz countertop with integrated glass sinks and LED accent lighting
Toilet Thetford Tecma china toilets with push button flush (45A, 45F, 45W)
Bathroom Shower Porcelain tiled shower walls and floor with skylight and frameless glass shower door
Shower Seat Teakwood shower seat (Not available in 45F)
Bathroom Ventilation Maxxair Deluxe power exhaust vent fan with intake
Shower Head Pivoting shower head and separate hand held spray wand


Blind Spot Monitoring Blind spot monitoring system displayed on digital dash screen
Security System Security system with glass shatter sensors
Lights Porch light and motion sensor security lights
Smoke Alarm Smoke alarm
Carbon Monoxide Detector Combination carbon monoxide detector and gas alarm
Security Safe Safe


Canadian Standards CSA Optional
Dinette Booth dinette passenger side (45A)
Dinette Option 2 Booth dinette driver side (45B, 45W and 45Y)
Freestanding Table Option 1 Free standing table with 4 chairs driver side (45X)
Theater Seating 100" theater seat passenger side (45B and 45Y)
Solar Solar panels (Dual-100 watt) with Morningstar SunSaver Duo solar panel charge controller
WiFi Extender Antenna Winegard WIFI extender with 4G/LTE
Reclining Sofa 100" reclining sofa passenger side (45B and 45Y)
Theater Seating Option 2 82" theater seat passenger side (45A)
Theater Seating Option 3 82" theater seat driver side (45W)
Theater Seating Option 4 74" theater seat passenger side (45F and 45X)
Satellite Dish Winegard in-motion dome, roof mounted satellite dish

Décor Options

Entegra Coach peace of mind

2 years
3 years
5 years

2-year warranty and 3-year roadside assistance

At Entegra Coach, excellence doesn’t end with our stunning interiors and superior craftsmanship. We back each luxury coach with the industry’s highest level of service—including a 2-year warranty and 3-year roadside assistance.

2-year warranty details

3-year roadside assistance details


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