Originally Posted by alphaxxn

B18C-R's .. or B18C5's in the US market HATE boost... they are a N/A beast and should be kept that way.

Another one of the B18C's though would be a better choice, or an even better one a B18B.

But you said tunability.. if your not looking for F/I.. then yeah, the R's rock, same head as the B16A2.. so basically stuff for that head should fit ok... like intake manifolds and such.