honestly, unless you know what you're doing, and have a flow bench (and ultimately how the car accelerates) to quantify results, you're wasting your time. it looks shiny, but won't give you more performance - which is what you want.
i worked extensively on a port - port match, straighten walls, bowl work, short turn radius - only to have it flow no more than stock! and then an experienced porter (who usually works on v8), within an hour, achieved excellent flow. there's a reason we pay porters good money for the results they give us. taking a course to learn to port properly costs thousands of dollars.
