Matt Jamniczky’s Jeep JK is what happens when a full custom rock crawler and a high-end street machine collide. Starting with a 4-door Jeep JK body, Wide Open Design designed and built a complete tube chassis and integrated cage system underneath, transforming the Jeep into a true off-road supercar capable of handling serious terrain while still maintaining comfort and drivability.
Power comes from a fuel-injected 427 cubic inch GM LT engine backed by a 4L80 transmission and Atlas transfer case, delivering massive horsepower with the reliability needed for long trail rides and hard wheeling.
The drivetrain sends power through balanced 1410 driveshafts into fully built Crane Axle 14-bolts front and rear featuring 40-spline chromoly axle shafts and a large brake package for confident stopping power.
The suspension combines:
- coilovers
- bypass shocks
- air bump stops
to absorb harsh terrain while still maintaining excellent ride quality and stability.
Inside, the JK blends luxury and functionality with:
- GPS navigation
- LCD gauges
- air conditioning
- heated custom seats
- storage space for gear and tools
Massive 42” tires mounted on 20” wheels complete the aggressive stance while every inch of the vehicle was carefully finished, polished, and detailed to match the performance underneath it.
This Jeep perfectly represents the balance between:
- high-performance off-road engineering
- luxury interior comfort
- custom fabrication
- trail-ready durability
| Category | Component | Technical Specifications |
|---|---|---|
| Chassis | Full Tube Chassis & Cage | Custom WOD-engineered integrated chassis system |
| Body | Jeep JK 4-Door Steel Tub | Vincennes steel tub with insulated, sealed, and Line-X coated interior for reduced heat and noise |
| Roof & Doors | Hard Top & Full Doors | Full hard top configuration with factory-style enclosed comfort |
| Engine | GM LT 427 | Fuel-injected 427 cubic inch LT-based V8 producing approximately 625 HP |
| Transmission | GM 4L80 | Overdrive automatic with reverse manual valve body & Winters Shifter |
| Transfer Case | Atlas | High-speed gearing setup capable of approximately 140 MPH vehicle speed |
| Gear Ratio | High-Speed Setup | Custom geared for high-speed desert and trail performance |
| Driveshafts | WOD 1410 Driveshafts | Heavy-duty high-speed balanced driveline package |
| Front Axle | Crane Axle Magnum Knuckle 14-Bolt | Fully built front axle with Magnum knuckles and ARB locker |
| Rear Axle | Crane Axle 14-Bolt | Fully built rear axle with ARB locker |
| Differential Setup | ARB Air Lockers | Front and rear selectable lockers with onboard air support |
| Air System | Multi-Use Air Supply | ARB compressor system capable of airing tires and powering light air tools |
| Future Upgrade Path | Spool Compatibility | Axles can later be converted to spool configurations if desired |
| Axle Shafts | 40-Spline Chromoly Shafts | Heavy-duty race-grade axle shaft package |
| Steering | Full Hydraulic Steering | High-performance hydraulic steering system |
| Suspension | Coilover & Bypass System | Long-travel suspension with air bump stops |
| Wheels | Raceline RT260 Avenger Beadlocks | 20x10 beadlock wheels with raw bead rings |
| Tires | Nitto 42” DOT Compound Tires | Large diameter DOT-approved off-road tire package |
| Brakes | Crane Axle Magnum Brake Kit | High-performance front and rear braking system |
| Interior | Luxury Off-Road Interior | GPS, LCD gauges, heated seats, AC, and integrated trail storage |
| Cabin Comfort | Noise & Heat Reduction | Fully insulated and sealed interior for improved ride comfort |
| Vehicle Style | Off-Road Supercar | High-speed luxury crawler with race-ready capability |
Questions or Comments?
We'd love to hear your thoughts or answer any questions.