Can't seem to recall exactly if the Hyd. turbo cams were as much of an improvment to the Hyd lifter 4kq as the solid turbo cams were to the solid lifter NA cars... The GF wants a little more top end on the 4kq after a couple of trips in the 90q. :) Thanks! -Nate '89 90q (fresh 3in exhorst ;)