South Bends' DXD HD Clutch Kit is a great kit for anyone looking to retain an as close to stock type feel. These clutches utilize a full face, sprung hub, organic carbon disc. You can expect smooth engagement, moderate pedal pressure increase and very minimal noise.
The kit has a torque capacity rating of 456 ft. lbs so it will hold up very well on a tuned, bolt on, STi. A 500 or so mile break in is required.