1.Proven Brand & Engineering

Ironman 4×4 is an Australian brand with decades of experience in building rugged suspension systems.  - ref Unsealed 4X4, ironman4x4.me

2. Vehicle-Specific Tuning

The Ironman Nitro Gas kit for the Suzuki Jimny (2018+) is specifically tuned for that model. 

The shock absorbers are matched with coil springs that are rated for different load-ranges (medium, heavy) depending on how much extra weight you’re carrying (gear, rooftop, etc.).  - ref IRONMAN 4X4 Australia, 4wheelhouse

3. Good Lift + Load Handling

Their medium kit gives ~50 mm (2”) lift.  - ref 4wheelhouse

They also have a GVM (Gross Vehicle Mass) upgrade kit. This increases the legal payload of the Jimny significantly (from ~1,435 kg to ~1,785 kg), meaning you can carry more gear safely.  - ref 4X4 Australia

4. Durable Build

The shocks (Nitro Gas) use a twin-wall (twin-tube) design. - ref IRONMAN 4X4 Australia

Coil springs are steel and matched to load, which helps maintain ride height and handling even under load.  - ref 4x4.ec

Includes necessary hardware: drop brackets, extended brake hoses, bump stops, etc.  - ref IRONMAN 4X4 Australia

5. Warranty

Ironman offers a 3-year unlimited-km warranty on its Nitro Gas shocks (at least for many of its kits), which speaks to confidence in their quality. 

6. Global / Local Availability

While Australian, Ironman 4×4 parts are available via importers or authorised 4×4 accessory shops in other markets (depending on where you are). For example: Futurz 4x4 lists the Jimny Ironman Nitro Gas kit for India. 

7. Real-World Testing & Use

There are reports (4X4 Australia) that the Suspension Load Upgrade not only gives lift but improves ride quality. 

Some Jimny owners on forums mention that Ironman’s rear springs can feel very comfort for driving:

“The Ironman rear springs are smooth and comfortable on the market … I ran the Ironman kit myself … but it will last.”