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Keystone Cougar 360MBI

Fifth wheelbuilt 2025– (in production)Mixed build tierFindable on the used market
WHAT ONE COSTS
$91,300MSRP today

Still in production. A used 2023 would run roughly $53,900.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~13,925 lbestimated as towed, for 2 people

dry weight 12,499 lb + fresh water (75 gal, full) 626 lb + propane + battery 200 lb + gear for 2 600 lb. Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around15,475 lb (10% margin)
GVWR (the sticker maximum)15,000 lb
Tongue weight, loaded~2,451 lb (18%)
Cargo capacity2,501 lb
WHICH TOW VEHICLES IT FITS: 19 OF 95

Judged the way the app judges: estimated loaded weight against each vehicle's rating less a 10% margin, per model year, because the 360MBI's published weights held steady. Fifth wheels also need a pickup bed and are held to the fifth-wheel rating where published.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 2500HD (Duramax, max tow) '24-2622,500 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-2318,510 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-1918,100 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '20-2636,000 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '11-1923,300 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, gooseneck) '20-2222,800 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-1918,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel) '11-1616,600 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 HO diesel, gooseneck) '23-2623,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '17-1932,500 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '20-2237,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '11-1621,600 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2638,000 lbfits, loaded, with 10% margin
Ford F-450 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2640,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins HO) '19-2620,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins) '11-1817,980 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins DRW, gooseneck) '13-1831,210 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '25-2636,610 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '19-2437,090 lbfits, loaded, with 10% margin
The 76it doesn't fit

These verdicts assume 2 people aboard with typical gear. See the margin for your truck and your crew →

THE SPECS
Length39.3 ft
Height (incl. A/C)13.3 ft
GVWR15,000 lb
Dry weight12,499 lb
Dry tongue weight2,200 lb
Cargo capacity2,501 lb
Sleeps10
Slide-outs4
Axles2
Fresh water75 gal
Grey water76 gal
Black water38 gal
Air conditioning18,000 BTU
Awning27 ft

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

WHERE PEOPLE SLEEP
  • 1× front bedroom queen (70×80 king optional)(Permanent)60×80
  • 2× mid bunk room bunks(Permanent)—
  • 1× tri-fold sleeper sofa(Convertible)—
  • 1× booth dinette converts to bed(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Keystone (Mixed tier): Keystone's mid-tier fifth wheel — decent laminated build and huge volume, but Keystone-grade QC keeps it out of the top tier.

YEAR BY YEAR: WHAT CHANGED
  • 2025Introduced as the 368MBI successor
FINDING ONE

Findable: a few listed nationwide most weeks. Why: Keystone is a volume manufacturer; only 2 model years; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Mid-bunk island plan sleeping ten - the replacement for the long-running 368MBI.

OTHER COUGAR FLOORPLANS
23MLE · 10,075 lb · sleeps 623MLS · 10,000 lb · sleeps 624RDS · 10,000 lb · sleeps 625RES · 10,000 lb · sleeps 6260MLE · 12,000 lb · sleeps 426RES · 10,300 lb · sleeps 426RKE · 11,000 lb · sleeps 62700BH · 9,900 lb · sleeps 1027SGS · 10,290 lb · sleeps 428RLI · 11,000 lb · sleeps 6290RLS · 12,200 lb · sleeps 629MBD · 11,500 lb · sleeps 1029MBS · 11,000 lb · sleeps 929RKS · 10,400 lb · sleeps 6the whole line →
Find one for sale

Live listings for the 360MBI 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 Cougar line ↗

Is the 360MBI 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.