The Jayco Seismic 399 is a premier toy hauler fifth wheel, expertly engineered for adventurers who refuse to compromise on comfort or durability. This model features a massive 13' 6" garage, providing ample space for all your gear and toys, with the added convenience of an optional half bath. Built with Jayco’s legendary high-quality construction and backed by an outstanding warranty, the Seismic 399 offers unparalleled peace of mind on the road. The luxurious living quarters, including a chef-inspired kitchen and a private master suite, ensure you can unwind in style after a day of adrenaline-fueled fun. It's the perfect combination of a rugged hauler and a residential-style RV.

NEW Jayco Seismic 399

Hitch:

3,370 lbs.

UVW:

14,950 lbs.

Length:

45' 11"

Sleeps:

up to 8

Stock: 26-22861N   •   Location: Tulsa

KEY FEATURES

Jayco 2+3 Year Warranty

Jayco has a decades-long reputation of quality, backed by 2-year limited and 3-year structural warranty for peace-of-mind protection.

 

5-Star Handling Package

Enjoy a safer and smoother ride with 16-ply “H” rated Cooper tires, ABS and tow assist, MORryde CRE-3000 suspension system, Rota-Flex king pin, wet bolt fasteners, bronze bushings, and 4K lb. leaf springs.

 

HELIX Cooling System (3 A/Cs)

Three exterior-mounted 13,500 BTU soft-start, high-efficiency, ducted A/Cs, directional and closeable A/C vents, and insulated dual-duct design.

 

13' 6" Garage

Take the fun with you, whether it is motorcycles, ATVs, kayaks, or other equipment, there's room for cargo here!

 

6-point Hydraulic Auto Level

Setting up camp is a breeze with this powerful hydraulic auto leveling system.

 

YAMAHA Generator

Power is never an issue with the NPS-powered Yamaha 6,000W generator with built-in pure sine inverter.

 

 

360 TOUR

SPECS AND OPTIONS

FACTORY-ADDED OPTIONS

• USA Standards
• Customer Value Package
• Five Star Handling Package
• Tinted Safety Glass Windows
• King Bed
• Half Bath

DOWNLOAD MSRP SHEET

SPECS

• Dry Hitch Weight (lbs): 3,370
• Unloaded Vehicle Weight (lbs): 14,950
• Cargo Carrying Capacity (lbs): 5,450
• Gross Vehicle Weight Rating (lbs): 20,400
• Exterior Length (overall): 45' 11"
• Exterior Length (pin to bumper): 44' 5"
• Exterior Height: 12' 8"
• Exterior Height (with A/C): 13' 2"
• Exterior Width: 8' 6"
• Exterior Width (with slides out): 13' 6"
• Interior Height (main): 8' 3"
• Interior Height (upper deck): 6' 4"
• Awning Length: 21' 0" and 11' 0"
• Garage Length: 13' 6"
• Fresh Water Capacity (gals): 106
• Gray Water Capacity (gals): 87
• Black Tank Capacity (gals): 87
• Propane Unit (lbs): 60
• Sleeps up to: 8
• Water Heater: 16
• Furnace BTU: 35000
• Tire Size: 215/75R17.5H

 

STANDARD FEATURES AND PACKAGES

STANDARD EXTERIOR EQUIPMENT

• 102 in. wide-body structural steel I-beam construction
• Stronghold VBL™ aluminum-framed and vacuum-bond laminated gel-coated fiberglass exterior walls and slide room end walls
• Magnum Truss™ XL6™ Roof System (strongest tested roof in the industry) with Alpha roof membrane system (limited lifetime warranty)
• Painted fiberglass front cap with clear coat and built-in specialty LED lighting
• Custom automotive-grade vinyl exterior graphics package
• Climate Shield™ zero-degree tested weather protection (package details below)
• NPS – Powered by Yamaha® 6,000-watt generator with built-in pure sine inverter (gas/C.A.R.B. certified)
• 6-point hydraulic auto-leveling system
• Battery disconnect switch
• Detachable shore power cord
• Dual 30 lb. propane bottles with auto regulator
• Water heater bypass
• LP quick-connect
• Exterior marine-grade speakers
• Digital TV antenna
• Folding roof ladder
• LED exterior lighting package
• JaySMART™ (Safety Markers And Reverse Travel) LED lighting (patented)
• HELIX Cooling System™ with three exterior-mounted 13,500 BTU soft-start, high-efficiency, ducted A/Cs, directional and closeable A/C vents, and insulated dual-duct design
• Pass-through storage with Slam-latch™ baggage doors
• Under-mounted spare tire
• Fully enclosed, LED-lighted universal docking center with black tank flush, winterization and sanitation hookups, quick-connect outside shower, and satellite prep

STANDARD INTERIOR EQUIPMENT

• Olympic king bed (359 & 413)
• Residential quilted bedspread
• Gas-strutted under-bed storage
• Washer/dryer prep
• 12V charging station
• Bathroom skylight
• Central command center with built-in tank monitoring
• Custom interior design (Dune Gray)
• LED interior lighting throughout
• LED fireplace with electric space heater (select models)
• No in-floor heat registers throughout the coach
• Vinyl flooring in slideouts (no carpet)
• Residential vinyl flooring (made in the USA)
• Hardwood safety handrail on hallway steps
• Carbon monoxide and LP detector
• 5/8 in. tongue-and-groove joined plywood main floor decking and 3/8 in. tongue-and-groove plywood roof decking
• Handcrafted and glazed doors, drawers, and trim
• Solid hardwood cabinet doors
• Residential finished dovetail-jointed drawers throughout
• Heavy-duty, 75 lb., full-extension, steel ball-bearing drawer guides
• SuperSofa™ or theater seats with heat, massage, and LED lighting (select models)
• Stain-protected fabric on all furniture
• Residential “Do it all” sink with pull-out kitchen faucet, glass rinse, and vegetable rinse
• Porcelain foot-flush toilet
• Inverter pre-wire

RAMP AND CARGO EQUIPMENT

• 30 gal. fuel tank with timer
• Garage D-rings mounted to steel frame
• HappiJac® electric-lift queen beds/convertible sofas with folding armrests and cup holders
• Three-season removable garage wall/doors
• Tuff-ply™ rubberized garage floor liner
• Rear ramp door and patio with anti-slip, non-skid flooring
• Ramp patio kit with exterior steps
• Rear electric patio awning
• LED high-intensity ramp lights
• Ram air vents and power roof vent

CLIMATE SHIELD™ WEATHER PROTECTION

• Zero-degree tested performance
• 35K BTU output furnace
• Double-layer fiberglass batt insulation in ceiling and floor
• Double-sided radiant barrier insulation (roof and floor)
• Fully enclosed and heated underbelly (ducted)

CUSTOMER VALUE PACKAGE (MANDATORY)

• On-demand tankless hot water heater
• 50-amp service
• Overlander II Solar Package: 30-amp solar controller with (2) roof-mounted 200W solar panels and a 1,800W inverter
• 17 cu. ft. 12V refrigerator
• 30 in. space-saver microwave
• Residential 21 in. oven with three burners
• 4K Smart LED HDTV with fully digital HDMI® output
• Touch-screen Bluetooth® stereo with four speakers
• Electric patio awning with integrated RGB LED lights (multi-color with remote control)
• MORryde® strut-assisted fold-away entrance steps (main entrance)
• Custom black, machined aluminum rims
• Keyed-Alike™ lock system
• Bathroom power vent
• Night roller shades
• Hidden hinges and magnet door catches on cabinet doors

5 STAR HANDLING PACKAGE (MANDATORY)

• 17.5 in., 16-ply “H” rated Cooper® tires
• Dexter® axles with ABS and Tow Assist – includes Nev-R-Adjust® brakes and E-Z Lube® hubs
• MORryde® CRE-3000™ Suspension System
• Rota-Flex® king pin
• Wet bolt fasteners, bronze bushings, and 4K lb. leaf springs
• 2nd electric patio awning with integrated RGB LED lights (multi-color with remote control)