Shannons is an enthusiast car insurance companies. Who else markets their business with Go-ggo Mobiles in their television advertisments? :Oops:
As a result, they only insure specialist automobiles and enthusiast owners. They won't insure your Hyundai Excel, nor your Mitsubishi Mirage, no matter how many pieces of fibreglass you have rivetted to the bodywork. The other side of the coin means they won't just insure any old habibi off the street. You have to prove yourself to be an enthusiast who loves their car, looks after it and won't go drifting it around 90 degree corners at 2nd gear redline and wipeout a bus station at 2am in the morning.
The easiest way they know how to establish that level of enthusiast, is to insure owners who are part of registered car clubs. The other way is to have a phone or in-person interview with them, where they will gauge your attitude and maturity. They commonly have stands at Supernats and such events where they have consultants at hand that are able to do this and give you a quote even if you aren't a member of a club.
Easiest way though? Join Skylines Australia NSW!! We're a registered club and Shannons acknowledges us in their list of car clubs.
I have my 1997 R33 GTR insured through Shannons.