45 bucks a year only applies under 27/28 or so. It's about 150 otherwise.
Also, not that I've used but you get access to a pretty cool library of info too.
"Our collection of motorsport and motoring information in our magnificent Eric Rainsford Library, is one of the largest in the southern hemisphere. The Library offers Club Members workshop manuals, spare parts lists, current motoring journals and motoring books in addition to videos. Over 7000 volumes including workshop manuals, spare parts lists, motoring journals and books are mostly available for Members to borrow and research is available to non-Members."