THE QUIETEST RIDING, BEST HANDLING COACH ON THE MARKET TODAY. PERIOD.
2026 Cornerstone
Live out your dreams in ultimate luxury in the Cornerstone, Entegra Coach's flagship diesel pusher and the #1 selling coach in the 605HP engine category. Built utilizing unique construction techniques and offering numerous ride and handling upgrades, the Cornerstone is truly the quietest riding, best-handling coach on the market today—period. Premium interior features and materials take this powerful motorhome to the next level. The Cornerstone is the epitome of power meets luxury.
The Cornerstone is built upon the Spartan K3 or Freightliner SL chassis. Both chassis features a Cummins 605HP engine, side-mounted radiator, custom-tuned Koni shocks and the Valid™ Truline air leveling system for a powerful and smooth ride you won't find anywhere else.
Inside the cockpit,... Read More
Brochure
Gallery
Floorplans
Ward = wardrobe
Lav = bathroom sink
Med = medicine cabinet
Ohc = overhead cabinets
Fridge = refrigerator
Micro = microwave
2026 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' 8" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 175 (150 on Freightliner chassis) |
| Furnace (BTU Output) | 96, 000 Aqua-Hot |
| Wheel Base | 320" |
2026 Cornerstone|45D
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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' 8" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 175 (150 on Freightliner chassis) |
| Furnace (BTU Output) | 96,000 Aqua-Hot |
| Wheel Base | 320" |
2026 Cornerstone|45R
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' 8" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 175 (150 on Freightliner chassis) |
| Furnace (BTU Output) | 96,000 Aqua-Hot |
| Wheel Base | 320" |
2026 Cornerstone|45V
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' 8" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 175 (150 on Freightliner chassis) |
| Furnace (BTU Output) | 96,000 Aqua-Hot |
| Wheel Base | 320" |
2026 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' 8" |
| Interior Height | 84" |
| Fresh Water Capacity (gals) | 100 |
| Grey Waste Water Capacity (gals) | 62 |
| Black Waste Water (gals) | 41 |
| Fuel Tank Capacity (gals) | 175 (150 on Freightliner chassis) |
| Furnace (BTU Output) | 96,000 Aqua-Hot |
| Wheel Base | 320" |
All Floorplans
2026 Cornerstone | 45B
2026 Cornerstone | 45D
2026 Cornerstone | 45R
2026 Cornerstone | 45V
2026 Cornerstone | 45Z
360°
Virtual Floorplan Showings and Product Specifics Are Subject to Change Without Notice
Exterior Graphics
Standards & Options
Chassis
| Chassis | Spartan® K3 raised-rail chassis |
| Engine | Cummins® 15 liter X15 turbocharged 605 HP engine with 1,950 lb. ft. torque at 1,150 RPM |
| Transmission | Allison® 4,000 MH 6-speed transmission |
| Radiator | Side-mounted, parallel-airflow radiator |
| Alternator | 210 amp alternator |
| Engine Block Heater | 1,500W engine block heater |
| Engine Brake | Three-stage engine brake |
| Tag Axle | Reyco® Granning® front axle with independent front suspension, integrated anti-sway bar and custom-tuned Koni® shocks- 20,000 lb. rating |
| Rear Axle | Dana® rear axle - 20,000 lb. rating |
| Braking System | All-wheel ABS disc brakes |
| Rear Axle Ratio | 4.30 rear axle ratio |
| Tires | Michelin® 365/70R 22.5 in. tires (front) and 315/80R 22.5 in. tires (rear) |
| Tire Pressure Monitoring | Tire pressure monitoring system (TPMS) with temperature monitoring |
| Traction Control | Automatic traction control |
| Leveling System | Equalizer™ hydraulic automatic coach leveling |
| Air Leveling | Valid™ Truline air leveling system with auxiliary air compressor |
| Air Connection | Remote air connection |
| Chassis Battery | (2) 12V chassis batteries |
| Fuel Tank | 175 gal. fuel tank with dual fills |
| DEF Tank | 15 gal. DEF tank with dual fills |
| Tow Air Brake System | Spartan® Safehaul tow vehicle air brake system |
| Hitch | 20,000 lb. hitch with 7-pin plug |
Construction
| Roof | 4 in. arched aluminum trusses filled with batt insulation and reflective Flexfoil® topped with 3/8 in. plywood decking then one-piece fiberglass |
| Walls | 2-1/2 in. exterior walls with Aluma-Tru™ welded tubular aluminum studs on 16 in. centers or less, filled with batt and Flexfoil® insulation, then covered with high-gloss gelcoat fiberglass (R-16) |
| Floor | 2 in. x 4 in. wood trusses on 16 in. centers or less filled with batt and Flexfoil® insulation then topped with 3/4 in. 7-ply plywood decking (R-33) |
| Frame | X-Bridge™ bracing welded into chassis frame |
| Slideouts | Entegra Coach-exclusive ElectraGlide flush-mounted 12V slideout system |
Heat, AC, Water & Power
| Heated Tanks | Aqua-Hot® heated basement storage |
| Generator | Onan® 12,500W diesel generator, with automatic start, on powered slide-out tray |
| Inverter | Victron 3,000W pure sine wave inverter with LED screen |
| Batteries | (4) L16 AGM batteries (6V/390 amp hrs. ea.) |
| Solar | (2) 200W solar panels |
| Electrical Hookup | 50 amp power cord on electric powered reel |
| Transfer Switch | Smart automatic transfer switch with surge protection |
| Air Conditioning | (3) 15,000 BTU A/C units with heat pumps and condensation drain system |
| Heating System | Aqua-Hot® 600D hydronic water and heating system with in-floor heat throughout and engine preheat |
| Black Tank Management | Sani-Con® macerator holding tank dump system with power gate valves and manual backup |
| Tank Flush | Black tank flush; Grey tank flush |
| Tank Assist | Tilt tank dump |
| Water Filtration | City and tank water filtration system |
| Water Hook-Up | Hot and cold water hook-up in front cap area with 30 ft. quick-disconnect hose |
| Water Softner | Water softener prep in driver-side compartment |
| Water Hose w/ Electric Reel | Water hose with electric reel |
Exterior
| Front/Rear Cap | Insulated front and rear caps (R-24) |
| Stainless Steel Accents | Executive Bus Armor 10 in 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 power window awnings |
| Windows | Frameless, dual-pane, tinted, safety-glass windows |
| Keypad | Lit grab handle with doorbell and keypad system for keyless entry |
| Entertainment | 43 in. Samsung® QLED 4K UHD Smart TV with tilt, swivel, and extend adjustment; JBL® soundbar with USB port and receptacle |
| Mirrors | Blind-spot monitoring indicators in chrome, heated, remote-control side-view mirrors |
| Exterior | Diamond Shield™ front protective film mask |
| Headlights | Automatic LED high and low beam headlights |
| Fog Lights | Halogen fog lights |
| Daytime Running Lights | Automatic daytime running lights |
| LED Lights | LED marker lights, turn lights, license plate light, third brake light, accent lights and docking lights |
| Accent Lights | LED accent lights under all slideout rooms |
| Chrome Accents | LED-lit chrome clearance accent light |
| Lights | Porch light and motion sensor security lights |
| Rear Mudflap | Mudflap with chrome “Entegra Coach” nameplate |
| Satellite Internet | Starlink satellite internet system |
| Satellite Dish - US | Winegard® TRAV’LER satellite dish DIRECTV® - standard with USA option |
| Satellite Dish - CA | Winegard® TRAV’LER Pro satellite dish Shaw TV - standard with CSA option |
| Antenna | Winegard® Rayzar Automatic powered TV antenna |
| Wi-Fi | Winegard® WiFiRanger™ Wi-Fi extender |
| Utility Center | Heated exterior utility center with 5 in. LED Firefly® tank monitoring panel |
| Cargo Features | (2) power slideout basement storage trays |
| Freezer | 2.8 cu. ft. exterior refrigerator/freezer on slideout tray |
| Baggage Doors | Push-button, power-unlatching baggage doors with LED indicator light |
| Exterior Walls | Sikkens custom full-body paint |
| Entrance Door | Removable screen on entry door |
Cockpit
| Collision Mitigation | Collision avoidance system with collision warning, adaptive cruise control and electronic stability control |
| Additional Amenities | Bergstrom dual-zone HVAC system; Dual USB port and one 12V socket for charging |
| Dash | Valid™ 15 in. digital dash with quad core graphics processor, on-board diagnostics and ability to display traditional instrument cluster, 360° camera system or GPS navigation |
| Cameras | Delta Mobile Systems® aiDARS™ 1X active 360° surround view system with 14 smart radar sensors and 6 HD cameras displayed on digital dash screen |
| Infotainment System(s) | Valid™ infotainment system with 15 in. touchscreen, Sygic navigation, Bluetooth®, Sirius XM™ and AM/FM tuner, integrated camera control, house mode whole-coach audio distribution and integrated VegaTouch coach control |
| Side Consoles | 4.3 in. infotainment control touchscreen in passenger console |
| Driving Features | E-Z Steer™ adjustable power steering assist |
| Steering Wheel | Leather steering wheel with integrated controls for screen selection, instrument cluster navigation, media source selection, cruise, wipers and Bluetooth® phone functionality |
| Steering Column | Power tilt and telescoping steering column |
| Sound System | JBL® premium audio 11-speaker sound system with amplifier, speakers and DVC subwoofer |
| Antenna | All-in-one automotive antenna for AM/FM/Sirius/GPS dash radio system |
| Windshield | Ultra-Vision® one-piece wrap-around tinted windshield; Rain-sensing windshield wipers |
| Driver / Passenger Seats | Heated and cooled leather driver and passenger seats with powered 6-way adjustment, lumbar, recline, footrest and massage functions |
| Power Features | Powered driver's window; Powered flush stepwell cover |
| Pedals | Powered adjustable brake and accelerator pedals |
| Visors & Privacy Shade | Powered front sun visors and privacy shades |
Interior
| Electric Fireplace | LED-lit fireplace with 5,000 BTU heating element (45B, 45Z) |
| Television - Front Overhead | 32 in. Samsung® QLED 4K UHD Smart TV in front overhead |
| Command Center | Firefly multiplex system with 10 in. VegaTouch touchscreen for complete integration of coach controls, with remote monitoring and control (mobile app available) |
| Switches | Spyder 3.5 in. touchscreen switches throughout |
| Television - Living Room | 50 in. Samsung® QLED 4K UHD Smart TV |
| Sound - Living Room | Bose® sound bar with subwoofer and universal remote control |
| DVD Systems | Sony® Blu-ray™ player |
| Furniture | Premium leather Villa furniture |
| Flooring | Hand-laid porcelain tiled floors |
| Lighting | LED interior lighting |
| Ceiling | Decorative ceiling feature with integrated accent lighting |
| Window Treatments | Powered solar day and blackout night shades |
| Central Vacuuming System | Portable Shark® vacuum cleaner; Dirt Devil central vacuum system with in-wall dust pan |
| Interior Doors | Aire-Secure™ travel locks for all pocket doors |
| Bar | Bar area with beverage chiller and rain glass upper cabinet door with LED accent lighting (45R only) |
| Cabinetry | Hardwood cabinets and stiles throughout |
| Bunks | Bunks with industry-exclusive 300 lb. capacity each (45R) |
| Washer/Dryer | Stackable washer and dryer |
Kitchen
| Window | Window with push out lever operation and screen |
| Refrigerator | Stainless steel residential refrigerator |
| Cooktop | Induction cooktop with matching wood cover |
| Microwave | 1.7 cu. ft. convection microwave with air fryer function |
| Dishwasher | Fisher & Paykel dishwasher |
| Countertops | Solid-surface countertops with Blanco single-bowl granite sink and dimmable LED accent lighting |
| Water Dispenser | Filtered water dispenser at kitchen sink |
| Vent | Maxxair® power vent exhaust fan with intake and touch screen control |
| Drawer Guides | Soft-close dovetail drawers |
| Waste Basket | Large, deep drawer for waste basket with easy access trash chute |
| Storage | Pantry with pull-out shelves; Slide-out storage tray(s) in overhead cabinet |
Bedroom
| DVD Systems | Sony® Blu-ray™ player |
| Bed | Personal Comfort® A5 king-size mattress |
| Television | 43 in. Samsung® Crystal UHD Smart TV in bedroom |
| Sound | Bose® sound bar with universal remote control |
| Ceiling Fan | Ceiling fan |
| Nightstands | Nightstands with solid-surface tops |
| Wardrobe | Automatic light in rear closet |
Bathroom
| Countertop(s) | Solid-surface countertops with single sink and dimmable LED accent lighting |
| Shower | Porcelain tile shower walls and floor with skylight and frameless glass shower door |
| Shower Seat | Teakwood shower seat |
| Shower Head | Pivoting shower head and separate hand-held spray wand |
| Water Saving System | Aqua View SHOWERMI$ER™ water saving system |
| Toilet | Thetford® macerator toilet in main bath; Thetford® macerator toilet in mid bath (45D, 45R, 45V); Thetford® Aria china toilet in mid bath (45B) |
| Vent | Maxxair® Deluxe power exhaust vent fan with intake |
Safety
| Carbon Monoxide Detector | Carbon monoxide detector |
| Smoke Alarm | Smoke alarm |
| Security Safe | Storage safe |
Options
| Chassis | Freightliner SL chassis ILO Spartan K3 chassis |
| Theater Seating | Theater seating with power recliners and fixed center console (45R) |
| Dinette | Dinette booth ILO free-standing table and chairs (45B, 45D, 45V, 45Z) |
| Area Rug | Area rug set for living room and bathroom |
| Dishwasher Drawer | Cabinet with two drawers ILO dishwasher |
| Headboard | Wood headboard |
| Mattress | Sleepmade memory foam mattress |
| Exterior Color | Blackout package (includes black American Racing Octane wheels and black stainless steel 10" Executive Bus Armor trim, mirrors, mudflap and badging) |
| Satellite Dish | Winegard® in-motion satellite dome ILO Winegard® TRAV’LER |
| Satellite Dish - US | Winegard® TRAV’LER satellite dish Dish Network® ILO DIRECTV® |
| Canadian Standards | Canadian standards (CSA) |
Décor Options
Wood Options
Tile Options
The Entegra Coach Advantage
1. SPARTAN® K3 RAISED-RAIL CHASSIS
Every Spartan® chassis comes with a best-in-class 3-year/50,000-mile transferable warranty, with no deductibles. Spartan® chassis also boasts an industry-best, 20-year transferable warranty on the frame as well as a Cummins® 5-year/100,000-mile engine warranty and an Allison® 5-year/200,000-mile transmission warranty.
2. EXCLUSIVE X-BRIDGE™ FRAME
Our exclusive X-Bridge™ frame adds even more floor strength and structural rigidity, eliminating chassis flex and twisting; with it, the suspension—not the chassis—absorbs road shock and vibration.
3. FIVE-INCH-THICK FLOORS
The industry’s thickest floor starts with a 3⁄4" 7-ply plywood for dramatic reductions in energy transmission, noise and vibration. Cabinets are screwed directly to the wood and tile is laid precisely around them; other manufacturers place cabinets on top of the tile, causing squeaks or cracking.
4. RESIDENTIAL-STYLE WALLS AND ROOF
Our roof combines crowned aluminum truss rafters on 16" centers with Flexfoil®, fiberglass insulation and 3⁄8" plywood decking. Our sidewalls and rear cap are the ONLY triple-insulated walls on the market. Featuring Styrofoam™, Flexfoil® and glued batt insulation, our triple-insulated walls keep the coach quiet, and you comfortable, on the inside.
5. KONI® SHOCKS
Custom-tuned Koni shocks on all axles.
6. REYCO® GRANNING® PASSIVE-STEER TAG AXLE
The Cornerstone's passive-steer tag axle has a 14,000-lb, rating and a one-touch manual air dump. Disc brakes are featured on every axle.
7. VALID™ 15 IN. DIGITAL DASH
Integrated into the Cornerstones digital dash are a 360° camera, Valid® air leveling system, wireless TPMS and a dual-zone AC/heating system.
8. COLLISION MITIGATION SYSTEM
With adaptive cruise control and blind-spot monitoring.
9. E-Z STEER™ ADJUSTABLE POWER STEERING ASSIST
10. CUMMINS® 605HP ENGINE
11. INDUSTRY'S LARGEST WINDSHIELD
At 120 in., the Cornerstone's windshield is the largest in the industry. Not only does this provide a great view, but it also increases visibility and results in safer travel. Oversized wiper blades add to the safety factor by keeping your view clear in all weather. Fun fact: our windshields are manufactured in Turkey, home of the world's finest sand, to eliminate any distortion in the curved portions of the glass. This windshield delivers the best possible view of the road ahead.
12. CABINETS INSTALLED BEFORE TILE
Every other manufacturer in the motorhome industry tiles their entire floor prior to installing their cabinets and interior walls. This results in driving screws down through the tile, which causes in squeaks and creaks over time. At Entegra Coach, we take a residential approach by installing cabinetry and interior walls directly onto the wood subfloor. We then hand-tile around cabinetry. This takes more time on the production line, but it is an important factor in producing the quietest riding, best handling coach on the market today. Period.
13. MERITOR® 20,000-LB FRONT AXLE
With independent front suspension, integrated anti-sway bar and custom-tuned Koni® shocks.
Detail
Live out your dreams in ultimate luxury in the Cornerstone, Entegra Coach's flagship diesel pusher and the #1 selling coach in the 605HP engine category. Built utilizing unique construction techniques and offering numerous ride and handling upgrades, the Cornerstone is truly the quietest riding, best-handling coach on the market today—period. Premium interior features and materials take this powerful motorhome to the next level. The Cornerstone is the epitome of power meets luxury.
The Cornerstone is built upon the Spartan K3 or Freightliner SL chassis. Both chassis features a Cummins 605HP engine, side-mounted radiator, custom-tuned Koni shocks and the Valid™ Truline air leveling system for a powerful and smooth ride you won't find anywhere else.
Inside the cockpit, our cab-forward design features a 120-inch windshield, the largest in the industry, for an immersive view of the road. With a heads-up design, the newly updated Safe View dash features a 15-inch digital dash, 15-inch center console infotainment center and tri-pod steering wheel to keep everything at your fingertips while keeping your eyes on the road and hands on the wheel. Heated and cooled Italian leather cockpit seats with massage function will keep you nice and comfortable. At the same time, safety features include a collision mitigation system with blind-spot monitoring and the Delta Mobile Systems® aiDARS™ 1X active 360° surround view system. All these amenities allow the Cornerstone to deliver the best driving experience in the industry.
The Cornerstone's living space offers options in wood, décor, and tile color so you can build the coach of your dreams, regardless of your taste. Luxurious Italian leather furniture throughout, hand-tiled floors, backsplashes and showers, premium residential appliances, and custom-built hardwood cabinetry give the Cornerstone interior an unmatched look and feel.
While the Cornerstone is stunning inside and out, what makes it extraordinary lies beneath the surface. With residential hung-wall construction, 5-inch-thick wood floors, cabinets laid before tile installation and three layers of insulation, the true beauty of the Cornerstone is the incredible quality of its hand-built construction. These construction features add to the quiet ride of the Cornerstone and allow us to offer our customers the best warranty in the industry. With a two-year limited and 5-year structural warranty, you will feel true confidence and security in your Entegra Coach Cornerstone.
