hi, my brother has a mazda 3 sedan andhe hasbeen asking me to look for these parts in the North America.
but he told me these parts in foreigh language which I can't figuire out the English terms.
so I am here to ask. Any help in highly appreciated.

Azul



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In English, these would be an intake manifold (Cosworth, pic #1) and a throttle body (pic #2,) and I don't know who's is pictured here.
That throttle body appears to be cable operated though, and the 3 series uses an ETB (electronic throttle body, motor activated/controlled by the car's ECU.) The conversion can be done, but is not easy from what I've read.
Some have done the Cosworth intake manifold conversion as well. If I remember correctly, it's a European part and hard/expensive to come by in the US.