2026  Jayco  Seismic 399  Titanium full-body Paint - 8M0158

2026 Jayco Seismic 399 Titanium full-body Paint

The 2026 Jayco Seismic Toy Hauler is built for adventure, offering rugged durability and high-end comfort for all-season camping. With Climate Shield™ zero-degree tested weather protection, a 35,000 BTU furnace, and double-layer fiberglass batt insulation, you’ll stay comfortable in any climate. The fully enclosed and heated underbelly ensures peace of mind even in freezing conditions.

Built on a 102 in. wide structural steel I-beam frame, the Seismic features Stronghold VBL™ aluminum-framed walls, a Magnum Truss™ Roof System, and an Alpha roof membrane with a limited lifetime warranty. Reaching your destination is effortless with the 5-Star Handling Package, which includes Dexter® Axles with ABS and Tow Assist, 17.5 in., 16-ply "H" rated Cooper tires, and the MorRyde CRE 3000 Suspension System for a smooth, controlled ride.

Power is never an issue with the NPS-powered Yamaha 6,000W generator and the Overlander II Solar Package featuring two roof-mounted 200W solar panels, 30AMP Digital PWM Solar Controller, and an 1800W inverter. Inside, residential-style luxury awaits with an Olympic 66” x 80” bed, handcrafted hardwood cabinetry, and a SuperSofa or theater seats with heat, massage, and LED lighting (select models). The kitchen boasts a residential refrigerator, 30-inch space-saver microwave, and a residential 21-inch oven.

The garage is built for versatility, featuring HappiJac® electric-lift queen beds/convertible sofas, a Tuff-ply rubberized floor liner, and three-seasons removable wall/doors. Outdoor living is maximized with a rear ramp patio kit, anti-slip flooring, and a rear electric patio awning. Select models also offer an outside HALO griddle with JayPort® LP quick-connect.

Tech-savvy conveniences include a 4K Smart LED HDTV, touch-screen Bluetooth® stereo, and a Keyed-Alike™ lock system. With a blend of durability, luxury, and cutting-edge technology, the 2026 Jayco Seismic Toy Hauler is ready for your next great adventure.

Features May Include:

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 includes:
  • 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)
• 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™ (industry exclusive) includes:
  • Three exterior-mounted 13,500 BTU soft-start, high-efficiency, ducted A/Cs (living room and bedroom)
  • Directional and closeable A/C vents
  • 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
  • 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

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)

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

Specs:
Location: London, KY
Floorplan: Bath and a Half
Length: 45' 11"
Sleeps: 8
Slides: 3
Generator: Yamaha NPS 6000W
Dry weight: 14,950
GVWR: 20,400
Cargo Weight: 5,450
Hitch Weight: 3,310
Exterior Width: 8' 6"
Exterior Height: 13' 2"
Interior Height: 8' 3"
Fresh Water: 106
Grey Water: 87
Black Water: 87
Date of Tires: 2025
Upgrades: HALF BATH OPTION & TITANIUM FULL BODY PAINT OPTION