Entegra Coach Cornerstone 45X

Name: Entegra Coach Cornerstone 45X
Brand: Entegra Coach

Class Abuilt 2018–21Better build tierScarce on the used market

WHAT ONE COSTS

$460,000est. used (2021, 5 yr old)

Sticker was $749,730 in 2021. Out of production since 2021, so the used market is the only way to buy one. Estimate assumes a 2021 unit.

THE SPECS

Length44.9 ft

Height (incl. A/C)12.9 ft

Width8.4 ft

Interior height7.0 ft

GVWR54,000 lb

Dry weightnot published

Sleeps7

Slide-outs4

Fresh water100 gal

Grey water62 gal

Black water41 gal

Air conditioning45,000 BTU

Fuel150 gal

Engine / chassisCummins X15 605 HP diesel pusher / Allison 4000 MH / Spartan K3

GeneratorOnan 12,500W diesel with auto-start

A missing row means the maker never published that figure: unknown, not zero.

WHERE PEOPLE SLEEP

1× Walk-around king in rear bedroom(Permanent)72×80
3× Convertible sofa/hide-a-bed seating in main living area(Convertible)—

HOW IT'S BUILT: 4/5

WallsLaminated fiberglass

FrameAluminum

RoofWalk-on

UnderbellyEnclosed

Entegra Coach (Better tier): Thor Industries (Jayco / Entegra Coach, Middlebury IN)

YEAR BY YEAR: WHAT CHANGED

YEARS	GVWR	DRY	MSRP
2018	54,000 lb	—	$692,646
2019–21	54,000 lb	—	$749,730

2018Introduced
2021Last model year

FINDING ONE

Scarce: months of watching; be ready to fly and drive it home. Why: priced at the top of its maker’s range. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Highest-capacity pre-2021 Cornerstone; superseded by the 45R bunkhouse.

OTHER CORNERSTONE FLOORPLANS

45A · 54,000 lb · sleeps 6 45B · 54,000 lb · sleeps 4 45D · 54,000 lb · sleeps 4 45F · 54,000 lb · sleeps 6 45J · 54,000 lb · sleeps 6 45K · 54,000 lb · sleeps 6 45R · 54,000 lb · sleeps 7 45V · 54,000 lb · sleeps 4 45W · 54,000 lb · sleeps 4 45Y · 54,000 lb · sleeps 4 45Z · 54,000 lb · sleeps 4 the whole line →

Find one for sale

Live listings for the 45X on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Cornerstone line ↗

Is the 45X your #1, or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about. Set your priorities as sliders, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from dealer and aggregator listings, retrieved 2026-07.