Im going through the process of get my car complied with all rta guidlines.
Rims- over 2' taller 1' wider need to be engineered over this will need engineers cert http://www.rta.nsw.gov.au/registrati...vsi09_rev4.pdf
pod filters- pod filter are not illegal (nsw) as long as they are inclosed in a air box, than engineered
Ecu- any ecu mod must be taken to the RTA checking station to be tested for emissions before being engineered. ( 81-85 yourk st penrith nsw there is another one in east sydney can book this at RTA)
Fmic- legal as long as it has no modds to the impact zones crumple zones, than engineered
Suspension- anything over 1' needs to be engineered, good to have this done anyway (i have known holden commie drivers have troble with this as the are low to start with defects from police)
I will keep this post upto date as i go along