MY car is registered as 'modified' with Vigil. When my car is on the road with the charger (this week, when I get an HIF44...) I will notify them. I asked prior anmd they said 'as long as it's road legal'. In SA any car prior to Jan 1st of 1971 can have a supercharger or turbo without approval or notification of Transport SA.

Passenger cars manufactured prior to 1 January 1972 and passenger car derivatives (car type utilities and
panel vans) manufactured prior to 1 July 1976, fitted with petrol engines, can be fitted with a turbocharger or
supercharger without Transport SA approval.

TURBOCHARGING / SUPERCHARGING
Due to the complexity of the ADRs after 1 July 1976 affected by the fitting of a turbocharger or supercharger to
a naturally aspirated engine Transport SA requires the vehicle to be fitted with a Second Manufacturers ADR
plate to demonstrate compliance with all ADRs.
Passenger cars manufactured prior to 1 January 1972 and passenger car derivatives (car type utilities and
panel vans) manufactured prior to 1 July 1976, fitted with petrol engines, can be fitted with a turbocharger or
supercharger without Transport SA approval.
Passenger cars manufactured on or after 1 January 1972 but prior to 1 January 1974, fitted with petrol engines,
can be fitted with a turbocharger or supercharger without Transport SA approval subject to the following
condition:
• The carbon monoxide exhaust emission output emitted by the engine does not exceed 4.5% when tested
at the manufacturers recommended engine idle speed.
Turbo timers are not to be fitted to vehicles manufactured on or after 1 January 1972 (ADR 25 Anti-
Theft Locks). ADR 25 requires that the normal function of the engine only occurs when the ignition
lock is in the engine on position.