Short answer: yes, coilovers can be legal in South Australia—if they’re the right kind and set up properly, not some driveway science experiment.
They must comply with ADRs and SA’s Code of Practice (aligned with VSB 14), be securely lockable (no in-cabin height fiddling), and keep the car within the usual ride-height and clearance limits without causing tyre rub or bump-steer.
Go beyond the basic limits or meddle with systems like ESC, and you’ll need an engineer’s certificate and likely an inspection noted on the rego.
Fit quality parts, retain proper suspension travel and bump-stops, and don’t even think about chopped springs.
When in doubt, ask an Approved Vehicle Examiner and keep the setup documented—nothing ruins a Sunday cruise like a defect notice.
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