race cams for race head or just OEM head???
If OEM will certainly requiring machining. That's about all I know.......and IF I'm wrong well my disclaimer is this.......kiss my French something something dark-side
Welcome to the world of modding where you will most likely have to buy special tools (or make your own) to carry out your turbo upgrade.
Also,
Is labdirect.com.au one of your direct competitors?