AEBS teamed up with Professional Products to create the "Typhoon" intake manifold. They make one for the B16/itr and now one for the GSR (new for '05)
This manifold is BY FAR the best bang for your buck as far as mild all motor apps go. I have personally seen 15 WHEEL hp on a built LS/VTEC. Not to mention you can find this manifold for anywhere between 125 and 175 bux BRAND NEW.