THE QUIETEST RIDING, BEST HANDLING COACH ON THE MARKET TODAY. PERIOD.
2021 Cornerstone
Take one step inside the Cornerstone, and you’ll see why this is the best-selling model in the Cummins X 605HP engine category. This powerful coach delivers the ultimate luxury experience. With unmatched style, the 2021 model offers top of the line interior features such as new high-class quartz countertops, upscale porcelain tile floors and true Villa Italian leather furniture throughout. Technology enhancements like the updated Xite® XSG3 radio system, power driver’s cockpit window and 43” exterior Samsung® Smart TV allow you to live the life of luxury.
Brochure
Product Video
2021 Cornerstone "What's New" Walkthrough
Floorplans
Ward = wardrobe
Lav = bathroom sink
Med = medicine cabinet
Ohc = overhead cabinets
Fridge = refrigerator
Micro = microwave
2021 Cornerstone|45B
Specs
| Gross Vehicle Weight Rating (lbs) | 54,000 |
| Gross Combined Weight Rating (lbs) | 74,000 |
| Front Gross Axle Weight Rating (lbs) | 20,000 |
| Rear Gross Axle Weight Rating (lbs) | 20,000 |
| Tag Axle Gross Weight Rating (lbs) | 14,000 |
| Exterior Length | 44' 11" |
| Exterior Width | 101" |
| Exterior Height with A/C and Satellite | 12' 11" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 150 |
| Furnace (BTU Output) | 65,600 Aqua-Hot |
| Wheel Base | 320" |
2021 Cornerstone|45F
Specs
| Gross Vehicle Weight Rating (lbs) | 54,000 |
| Gross Combined Weight Rating (lbs) | 74,000 |
| Front Gross Axle Weight Rating (lbs) | 20,000 |
| Rear Gross Axle Weight Rating (lbs) | 20,000 |
| Tag Axle Gross Weight Rating (lbs) | 14,000 |
| Exterior Length | 44' 11" |
| Exterior Width | 101" |
| Exterior Height with A/C and Satellite | 12' 11" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 150 |
| Furnace (BTU Output) | 65,600 Aqua-Hot |
| Wheel Base | 320" |
2021 Cornerstone|45R
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Specs
| Gross Vehicle Weight Rating (lbs) | 54,000 |
| Gross Combined Weight Rating (lbs) | 74,000 |
| Front Gross Axle Weight Rating (lbs) | 20,000 |
| Rear Gross Axle Weight Rating (lbs) | 20,000 |
| Tag Axle Gross Weight Rating (lbs) | 14,000 |
| Exterior Length | 44' 11" |
| Exterior Width | 101" |
| Exterior Height with A/C and Satellite | 12' 11" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 150 |
| Furnace (BTU Output) | 65,600 Aqua-Hot |
| Wheel Base | 320" |
2021 Cornerstone|45W
Specs
| Gross Vehicle Weight Rating (lbs) | 54,000 |
| Gross Combined Weight Rating (lbs) | 74,000 |
| Front Gross Axle Weight Rating (lbs) | 20,000 |
| Rear Gross Axle Weight Rating (lbs) | 20,000 |
| Tag Axle Gross Weight Rating (lbs) | 14,000 |
| Exterior Length | 44' 11" |
| Exterior Width | 101" |
| Exterior Height with A/C and Satellite | 12' 11" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 150 |
| Furnace (BTU Output) | 65,600 Aqua-Hot |
| Wheel Base | 320" |
2021 Cornerstone|45X
Specs
| Gross Vehicle Weight Rating (lbs) | 54,000 |
| Gross Combined Weight Rating (lbs) | 74,000 |
| Front Gross Axle Weight Rating (lbs) | 20,000 |
| Rear Gross Axle Weight Rating (lbs) | 20,000 |
| Tag Axle Gross Weight Rating (lbs) | 14,000 |
| Exterior Length | 44' 11" |
| Exterior Width | 101" |
| Exterior Height with A/C and Satellite | 12' 11" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 150 |
| Furnace (BTU Output) | 65,600 Aqua-Hot |
| Wheel Base | 320" |
2021 Cornerstone|45Y
Specs
| Gross Vehicle Weight Rating (lbs) | 54,000 |
| Gross Combined Weight Rating (lbs) | 74,000 |
| Front Gross Axle Weight Rating (lbs) | 20,000 |
| Rear Gross Axle Weight Rating (lbs) | 20,000 |
| Tag Axle Gross Weight Rating (lbs) | 14,000 |
| Exterior Length | 44' 11" |
| Exterior Width | 101" |
| Exterior Height with A/C and Satellite | 12' 11" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 150 |
| Furnace (BTU Output) | 65,600 Aqua-Hot |
| Wheel Base | 320" |
2021 Cornerstone|45Z
Specs
| Gross Vehicle Weight Rating (lbs) | 54,000 |
| Gross Combined Weight Rating (lbs) | 74,000 |
| Front Gross Axle Weight Rating (lbs) | 20,000 |
| Rear Gross Axle Weight Rating (lbs) | 20,000 |
| Tag Axle Gross Weight Rating (lbs) | 14,000 |
| Exterior Length | 44' 11" |
| Exterior Width | 101" |
| Exterior Height with A/C and Satellite | 12' 11" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 150 |
| Furnace (BTU Output) | 65,600 Aqua-Hot |
| Wheel Base | 320" |
All Floorplans
2021 Cornerstone | 45B
2021 Cornerstone | 45F
2021 Cornerstone | 45R
2021 Cornerstone | 45W
2021 Cornerstone | 45X
2021 Cornerstone | 45Y
2021 Cornerstone | 45Z
360°
Exterior Graphics
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Standards & Options
Chassis
| Chassis | Spartan® K3 raised-rail chassis |
| Engine | Cummins® 15 liter X15 turbocharged 605 HP engine 1,950 lb. ft. torque at 1,150 RPM |
| Transmission | Allison® 4,000 MH 6-speed transmission |
| Radiator | Side-mounted radiator |
| Alternator | 210 amp alternator |
| Engine Block Heater | 1,500 watt engine block heater |
| Engine Brake | Three-stage engine brake |
| Air Leveling | Valid air leveling system with auxiliary air compressor |
| Leveling System | Equalizer hydraulic automatic coach leveling |
| Ride & Handling Package | Electronic stability control |
| Front Axle | Reyco® Granning®- 20,000 lb. rating |
| Front Suspension | Independent front air suspension (IFS) |
| Rear Axle | Dana® rear axle- 20,000 lb. rating |
| Tag Axle | Reyco® Granning® passive steer tag axle with air dump- 14,000 lb. rating |
| Braking System | All-wheel ABS disc brakes |
| Rear Axle Ratio | 4.30 rear axle ratio |
| Tires | Michelin® 365/70R 22.5” tires (front) and 315/80R 22.5” tires (rear) |
| Tire Pressure Monitoring | Tire pressure monitoring system (TPMS) with temperature monitoring |
| Traction Control | Automatic traction control |
| Shocks | Bilstein® shocks- 60mm front axle & 46mm rear/tag axles |
| Air Connection | Remote air connection |
| Chassis Battery | (2) 12V chassis batteries |
| Fuel Tank | 150 gal. fuel tank(dual fill) |
| DEF Tank | 15 gal. DEF tank (dual fill) |
| Turning Radius | 55 degree turning radius |
| Tow Air Brake System | Spartan® Safehaul tow vehicle air brake system |
| Hitch | 20,000 lb. hitch with 7/4-pin plug |
Construction
| Roof | 4" arched aluminum trusses filled with bat insulation and reflective Flexfoil® topped with 3/8" plywood decking then one-piece fiberglass |
| Walls | 2-1/2" exterior walls with Aluma-Tru™ welded tubular aluminum studs on 16" centers or less filled with bat and Flexfoil insulation then covered with high-gloss gelcoat |
| Floor | 2" x 4" wood trusses on 16" centers or less filled with bat and Flexfoil insulation then topped with 3/4" 7-ply plywood decking (R-33) |
| Frame | X-Bridge™ bracing welded into chassis frame |
| Slideouts | Entegra-exclusive Relia-Torque flush-mounted 12V slideout system with VegaTouch and rocker switch controls |
Heat, AC, Water & Power
| Heated Tanks | Aqua-Hot® heated basement storage on thermostat |
| Generator | Onan® 12,500 watt diesel generator, with automatic start, on powered slide-out tray |
| Inverter | (2) 3,000 watt pure sine wave inverters |
| Batteries | (4) L16 AGM batteries (6V/390 amp hrs. ea.) |
| Electrical Hookup | 50 amp power cord on electric powered reel |
| Power Management | Premium surge protector with smart transfer switch |
| Air Conditioning | (3) 15,000 BTU A/C units with heat pumps and condensation drain system |
| Black Tank Management | Sani-Con® Macerator holding tank dump system with electric gate valves and manual backup |
| Tank Flush | Black holding tank sprayer |
| Water Filtration | City and tank water filtration system |
| Winterization Drain System | Winterizing drain system |
| Water Monitoring | Trutank™ ultrasonic tank monitoring system displayed on VegaTouch screen |
| Water Hose w/ Electric Reel | Water hose with electric reel |
Exterior
| Front/Rear Cap | Insulated front and rear caps (R-24) with steel-reinforced front cap and windshield frame |
| Stainless Steel Accents | Executive Bus Armor 10” stainless steel trim |
| Engine Door | Power rear engine door with manual override |
| Patio Awnings | Dual roof-mounted Girard® Vision dual pitched patio awnings with LED lights |
| Door Awning | Girard® power entrance door awning with LED lights |
| Slideout Awnings | Girard® Ultra slideout awnings |
| Window Awnings | Girard® Ultra window awnings |
| Windows | Frameless, dual-pane, tinted, safety-glass windows |
| Keypad | Lit grab handle with keypad system for keyless entry |
| Entertainment | 43” Samsung® 4K UHD Slim, Smart TV wand Bose® Solo 5 sound bar on TV bracket with extend, tilt and swivel arm |
| Mirrors | Chrome, heated, remote control, Ramco side-view mirrors with integrated cameras and blind-spot indicators |
| Exterior | Diamond Shield™ front protective film mask |
| Headlights | LED high/low beam headlights and fog lights |
| Daytime Running Lights | Daytime running lights |
| Accent Lights | LED accent lights under passenger slideout rooms |
| LED Lights | LED marker lights, turn lights, license plate light, accent lights, & docking lights |
| Clearance Accent | LED lit chrome clearance accent light |
| Rear Mudflap | Full-width rear mudflap, with chrome “Cornerstone” nameplate |
| Satellite Dish - US | Winegard® TRAV'LER satellite dish DIRECTV®- standard with USA option |
| Satellite Dish - CA | Winegard® TRAV'LER satellite dish Shaw TV- standard with CSA option |
| TV Antenna | Winegard® Rayzar automatic powered TV antenna |
| Wi-Fi | Winegard® WIFI extender with 4G/LTE |
| Utility Center | Heated exterior utility center with 5" LED Firefly® tank monitoring panel |
| Freezer | 2.8 cu.ft. exterior Dometic® refrigerator/freezer on slideout tray |
| Cargo Features | Power locking baggage doors, (2) power slideout basement storage trays |
| Paint | Sikkens custom full body paint |
| Third Brake Light | LED third brake light |
| Entrance Door | Removable screen on entry door |
| Lights | Porch light and motion sensor security lights |
Cockpit
| Collision Mitigation | Collision avoidance system with collision warning and adaptive cruise control |
| Cameras | Xite™ 360° camera system that displays on digital dash screen |
| Dash | Valid 15” digital dash with selector knob and three main selection screens |
| Infotainment System(s) | Dual, glass panel 9” touchscreen in-dash infotainment center with Rand McNally™ RV navigation, Bluetooth, SiriusXM™, AM/FM tuner, integrated camera control, house mode whole coach audio distribution, and integrated VegaTouch coach control |
| Driving Features | E-Z Steer™ electric, adjustable power steering assist with steering angle sensor |
| Steering Wheel | VIP wood-grain, leather-wrapped, power tilt and telescoping steering wheel with integrated controls for radio, cruise, wipers and Bluetooth phone functionality |
| Blind Spot Monitoring | Blind spot monitoring system displayed on digital dash screen |
| Sound System | JBL® premium audio 11-speaker sound system with amplifier, speakers and DVC subwoofer |
| Windshield | Ultra-Vision® one-piece wrap-around tinted windshield |
| Start | Push button start system |
| Driver / Passenger Seats | Villa® 6-way power, lumbar, heated and cooled Italian leather driver and passenger seats with integrated seatbelt |
| Additional Amenities | Power operated toll window on driver's side, (2) dual USB ports and (2) 12V socket for charging |
| Power Features | Powered flush stepwell cover |
| Pedals | Power adjustable brake and accelerator pedals |
| Visors & Privacy Shade | Powered front sun visors and privacy shade |
| Side Consoles | Wrapped dash with molded side consoles |
Interior
| Television - Front Overhead | Samsung® 32” LED Slim 1080P Smart TV in front overhead |
| Command Center | 10” VegaTouch touchpad system for complete integration of coach controls (mobile app available) |
| Television - Living Room | 50” Samsung® 4K UHD Smart TV |
| DVD Systems | Sony® HD Blu-Ray® player |
| Sound - Living Room | Bose® Soundbar 700 sound system with wireless surround sound speakers |
| Furniture | Villa Italian leather furniture throughout |
| Flooring | Hand-laid, high-gloss porcelain floor tiles |
| Lighting | Premium, recessed, 12V, LED lighting |
| Ceiling | Decorative ceiling feature with integrated accent lighting |
| Window Treatments | Powered solar day and black out night shades |
| Central Vacuuming System | Central vacuum system |
| Interior Doors | Aire-Secure™ travel locks for all pocket doors |
| Electric Fireplace | LED lit fireplace with 1500W heating element (45B, 45X, 45Y, 45Z) |
| Cabinetry | Handcrafted hardwood cabinetry |
| Fascia | Handcrafted hardwood fascia |
| Washer/Dryer | Whirlpool® stacked washer and dryer |
Kitchen
| Refrigerator | Whirlpool® stainless steel residential refrigerator with ice maker and water dispenser |
| Cooktop | Induction cooktop with matching wood cover |
| Microwave | Whirlpool® Gold 1.9 cu. ft. convection microwave oven |
| Dishwasher | 24" stainless EZ clean Fisher and Paykel Dishwasher |
| Backsplash | Porcelain tile backsplash |
| Countertops | Quartz countertops with dimmable LED accent lighting |
| Sink | Blanco single bowl granite sink |
| Vent | Maxxair® power vent exhaust fan with intake |
| Waste Basket | Large deep drawer for waste basket with easy access trash chute (trash chute not available in 45F) |
| Storage | Slide out storage tray(s) in overhead cabinet |
Bedroom
| Bed | Select Comfort® Sleep Number® king-sized mattress |
| Television | 32” Samsung® LED, HD Slim 1080P Smart TV |
| DVD Systems | Sony® Blu-Ray® player |
| Sound | Bose® Solo 5 sound bar |
| Ceiling Fan | Ceiling fan |
| Nightstands | Nightstands with USB ports and solid quartz tops |
| Wardrobe | Large cedar-lined wardrobe with motion activated LED light |
Bathroom
| Countertop(s) | Quartz countertops with dimmable LED accent lighting |
| Sink | Integrated glass sink |
| Shower | Porcelain tile shower walls and floor with skylight and frameless glass shower door |
| Shower Seat | Teakwood shower seat (not available in 45F) |
| Shower Head | Pivoting shower head and separate hand-held spray wand |
| Water Saving System | Aqua View Showermiser water saving system |
| Toilet | SaniFlo macerator toilet in main bath (N/A on 45X, 45Y, 45Z) |
| Vent | Maxxair® Deluxe power exhaust vent fan with intake |
Safety
| Carbon Monoxide Detector | Carbon monoxide detector |
| Security System | Security system with glass shatter sensors |
| Smoke Alarm | Smoke alarm |
| Security Safe | Safe |
| Seat Belts | Seat belts in every designated seating position |
Options
| Canadian Standards | Canadian Standards- CSA |
| Theater Seating | Theater seating with power recliners and fixed console |
| Reclining Sofa | 100" power reclining sofa |
| Fireplace/TV/entertainment center and work station ILO sofa | Fireplace/TV/entertainment center and work station ILO sofa |
| Satellite Dish | Winegard In-Motion satellite dome |
| Satellite Dish - US | Winegard TRAV'LER Dish Network |
| Solar | Dual 100 watt solar panels |
| Dinette | Dinette booth |
| Freestanding Table | Freestanding table with 4 chairs |
Décor Options
Entegra Coach peace of mind
2-year warranty and 5-year structural warranty
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 limited warranty and a 5-year structural limited warranty.
Detail
Take one step inside the Cornerstone, and you’ll see why this is the best-selling model in the Cummins X 605HP engine category. This powerful coach delivers the ultimate luxury experience. With unmatched style, the 2021 model offers top of the line interior features such as new high-class quartz countertops, upscale porcelain tile floors and true Villa Italian leather furniture throughout. Technology enhancements like the updated Xite® XSG3 radio system, power driver’s cockpit window and 43” exterior Samsung® Smart TV allow you to live the life of luxury.
