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2025 Entegra Coach

2025 Entegra Cornerstone for Sale

We don't sell this from a lot. RVBrokers is a buyer's agent, so we help you find, price, and negotiate this model wherever it is, and line up an inspection before you pay.

Entegra's 605-horsepower flagship diesel pusher.

Class A Diesel44' 11"Sleeps 2 – 6Cummins X15 15L Diesel
Find this Cornerstone for sale Call 1-877-801-3190

Build your Entegra Cornerstone

Tell us the floor plan and budget you want. A real person hunts the right one and tells you what it should actually cost. New or used.

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The Cornerstone is the top of the Entegra range and the coach the brand built its reputation on. It rides on a Spartan K3 raised-rail chassis behind a 15-liter Cummins X15 making 605 horsepower and 1,950 lb-ft of torque — the same class of engine you find in over-the-road trucks — so long mountain grades simply disappear. At just under 45 feet across five floor plans (45B, 45D, 45R, 45W, 45Z, including a bath-and-a-half bunk layout), it is a true residence on wheels: premium Crown Compass leather throughout, heated and cooled massaging cockpit seats, hand-laid porcelain tile, a Firefly multiplex system with a 10-inch touchscreen, and a 15-inch digital dash with a 360-degree camera. Valid Truline air leveling and a full suite of driver-assist tech (adaptive cruise, collision mitigation, blind-spot monitoring) round it out. Reviewers regularly call the Cornerstone the best ride-and-handling value among six-figure coaches. If you want the most coach Entegra knows how to build, this is it.

Looking for a Entegra Cornerstone for sale?

You're in the right place. We don't sell the Cornerstone off a lot — we work for you, find the cleanest one on the market new or used, inspect it, and negotiate it. Below is everything you need to know before you shop: the real specs, every floor plan, the photos, what it tends to sell for, and a straight read on what owners love and what they grumble about.

Gallery

Cornerstone — inside & out

Entegra Cornerstone photo 1Click to enlargeEntegra Cornerstone photo 2Click to enlargeEntegra Cornerstone photo 3Click to enlarge
Specs

Cornerstone specifications

Length44' 11"
Sleeps2 – 6
Bathrooms1 – 1.5
ChassisSpartan K3 raised-rail, tag axle
EngineCummins X15 15L Diesel, 605 HP, 1,950 lb-ft torque
TransmissionAllison 4000 MH 6-speed Automatic
GeneratorOnan Quiet Diesel
StorageFull pass-through basement storage with power-latch baggage doors

Specs reflect the 2025 model year and can vary by floor plan and options.

Floor plans

4 Cornerstone floor plans

Tap any diagram to see the full layout. The floor plan you choose changes the sleeping setup, bath, and storage — it's the single biggest decision on this coach.

Floor plan

45W

45' four-slide layout with expanded living area

Floor plan

45Z

45' top-trim layout with rear master suite

Owner verdict

What buyers love and what to watch

What buyers love

  • The 605 HP X15 and K3 chassis deliver ride and handling that rivals coaches costing twice as much.
  • Top-shelf materials throughout, plus a rare bath-and-a-half bunk floor plan in the 45B.
  • Backed by Entegra's 2-year warranty, so the best used examples hold value strongly.

What to watch

  • Flagship pricing — even a used Cornerstone is a major financial commitment.
  • 45 feet plus a toad is a big rig; not every campground or driver is ready for it.
  • Heavy, complex systems demand a serious service budget and a capable diesel tech.

Notable features

  • 605 HP Cummins X15 on a Spartan K3 tag-axle chassis — true heavy-duty power
  • Premium Crown Compass leather furniture with heated, cooled, massaging cockpit seats
  • Firefly multiplex system with 10-inch touchscreen and 15-inch digital dash with 360-degree camera
  • Valid Truline air leveling, adaptive cruise, collision mitigation, and blind-spot monitoring
More from Entegra

Compare other Entegra Coach models

See the full Entegra Coach lineup ›

Questions

Entegra Cornerstone — buyer FAQs

How much does a Entegra Cornerstone cost?
Typically $220,000–$550,000 used; roughly $850,000–$990,000 new. Price swings hard on year, mileage, slide count, and condition, so treat that as a starting point — tell us the exact coach you're eyeing and we'll get you the real number.
Is the Cornerstone gas or diesel?
Diesel. It runs a Cummins X15 15L Diesel, 605 HP, 1,950 lb-ft torque on a Spartan K3 raised-rail, tag axle chassis.
How big is the Cornerstone?
It's 44' 11" long and sleeps 2 – 6. There are 4 floor plans to choose from.
Should I get a used Cornerstone inspected before I buy?
Yes — every time. Our independent inspectors check the roof, slides, levelers, and chassis before money moves, and our buyer's agents use anything they find to negotiate the price down.
Talk to a human

Ready to find your Cornerstone?

Tell us the floor plan and budget you want. We'll hunt the best one for sale, inspect it, and negotiate it — entirely on your side.

Find a Cornerstone Call 1-877-801-3190