If you are thinking of doing a LS/VTEC setup then stay away from turbo! And if you are wanting N/A then get a B16 head it is cheaper and flows better than the GSR. The B16 head is the base that Honda started with when developing the B18C5 head (type R). If you are wanting to go turbo jus spend the money you would have on a new head and have yours port and polished, and some good turbo cams if the budget will allow it. Upgrade the internals and possibly sleeve it if big boost is you goal and boost away.