Busa Extra Stuff

[Evero]

I've just ordered a HMF Dual Hi-Mount exhaust system from the states and have never brought stuff from the states before so,

What sort of delivery times can I expect?

I know there is a 5% duty on exhaust/parts of & GST at customs but is there anything else to be aware of?

What if I get them to pack it in coffee & write coffee on the packaging - what duty does coffee have