"unopened" and "street trim" info

[superroo]

Hey all, how are we?

I'm just after some clear definitions on the above two terms, "unopened" and "street trim", and what can be done while staying within those guidelines.

"Unopened" - obviously heads can't have been off. But what can be changed? Intake/exhaust manifolds? Rockers? Cams? (pretty sure that’s a no) injectors? and stuff like that

"Street trim" - pump fuel, street tyres, full exhaust. What about the interior? Only got to be street legal?

Thanks for your responses

Cheers