I'm suprised no1 has mentioned the Micra.
I just bought one for 2.8K unreg'd. so 3.4k reg'd on the road.
1.3L DOHC EFI.
Great on fuel. Has aircon. No powersteering though.
Just re-read your first post.
So you have about 380rwkw on a T67 25g.
With that much power, probably will be close to stock plenum's limit???
Have you looked at Nismo GTR intake plenum?