Lift Kits in QLD — The Practical Do’s and Don’ts (Keeping It Legal)
A lift can improve clearance and capability, but it can also create insurance and compliance headaches if it’s done wrong. This is a practical checklist to keep your build sensible, drivable, and aligned with Queensland’s LS9/LS10 framework.
Important: This is general information only. Requirements can vary depending on your exact vehicle category, ESC fitment, parts used, and how the lift is achieved. If you’re unsure, get advice before spending money.
Need help now? Start here: Queensland Modification Plates (Mod Plate Service) or Contact us with your vehicle + intended tyre size.
LS9 vs LS10 — what’s the difference?
- LS9 (Design Certification): the engineering/design package that sets out how the lift is to be done and what testing/evidence is required.
- LS10 (Modification Certification): the actual inspection/certification that your vehicle was modified exactly to the LS9 design and meets the checks.
If your lift needs certification, the LS10 signatory is typically certifying the vehicle against an approved LS9 design package.
Step 1 — Work out what “type” of lift you’re building
Minor (usually tyres/rims within allowed options)
If the tyre/rim change is permitted by the original manufacturer or otherwise permitted without certification, it’s typically treated as a minor modification.
Basic modification (no certification required — but still must be done properly)
- Up to 50mm lift from suspension, and/or
- Up to 25mm lift from tyres (that’s 50mm increase in tyre diameter), and
- Up to 75mm total combined lift
Even if you don’t need a mod plate under the basic limits, you still need to build it correctly: alignment, brakes, guards, speedo and safe handling matter.
Complex modification (certification required under LS9 + LS10)
- Up to 100mm lift from suspension
- Up to 25mm lift from tyres (max 50mm increase in tyre diameter)
- Up to 50mm body blocks
- Up to 150mm total combined lift
Body block rule: if the suspension lift exceeds 75mm, the allowable body block lift reduces (often to 25mm depending on the design).
Step 2 — The limits that catch people out
Tyres: diameter vs “lift”
Tyre diameter increase is not the same as ride height increase. A 50mm increase in tyre diameter only gives you 25mm of ride height.
Wheel track, tyre width, and guards
- Wheel track increase is limited (and must stay sensible for stability).
- Tyres can’t be wildly wider than what the manufacturer offered.
- Wheels/tyres must remain covered by guards/flares and have clearance at straight-ahead.
If you’re chasing tyre size, plan this first. Tyre size drives everything else: clearance, gearing, speedo accuracy, braking feel, and handling.
Step 3 — Stability is the real pass/fail
Lane Change Test (LT2)
For certified LS9 designs, the vehicle must be able to safely negotiate the lane change test (LT2). The headline “150mm max” only works if the vehicle still handles safely.
ESC (Electronic Stability Control)
If your vehicle has ESC, it must continue to function as intended after the lift. Evidence is required and must be retained by the certifier (e.g. manufacturer approval, recalibration, or testing evidence).
Before you lift: the practical checklist (do this, or expect regret)
1) Decide your tyre size first
- Pick the tyre diameter you actually want (exact size).
- Work backwards to the minimum lift required.
- Confirm guard coverage and clearance at full lock and full travel.
2) Pick a suspension kit that suits the job (touring/towing/load)
Examples (popular platforms): Outback Armour Ranger PX2 | Outback Armour Ranger PX3
3) Alignment and caster correction are not optional
- Poor caster = wandering steering, unstable braking, bad highway manners.
- Bad alignment = tyre wear and sketchy handling.
- Lift + bigger tyres magnify worn bushes/ball joints.
4) Don’t ignore the boring stuff (it’s what fails inspections)
- Brake hoses, ABS wiring, driveline angles, spline engagement and CV travel must remain within safe limits.
- Headlight aim/height and wheel guards must still comply.
- Speedo accuracy must be considered with tyre changes.
5) Keep documentation
- Parts invoices and specs
- Install receipts
- Wheel/tyre specs
- Any ESC evidence required
Common mistakes (what causes compliance pain)
- Mixing parts with no plan: cheap “stacked” lifts often drive terribly and create stability issues.
- Tyres too large without supporting changes: clearance, speedo, braking and steering get worse fast.
- No alignment/caster correction: then blaming the kit for poor drivability.
- Ignoring stability/ESC: modern vehicles need evidence and safe handling, not just height.
Need guidance?
If you’re unsure where your build sits (basic vs complex), send us:
- Vehicle make/model/year
- Whether it has ESC
- Intended tyre size (exact)
- Planned suspension lift amount
- Any body blocks planned
Contact us here: https://scdieseltuning.com.au/contact/
If you want a pre-check before certification day: Vehicle Inspection Reports
General information only. Confirm your specific setup and certification pathway before proceeding.
