Drilled give extra bite BUT will develop cracks from the heat IF you push them, and I mean hard. Slotted give gasses and dust from the pads an outlet (not really a problem) and extra bite IF you push them, and I mean race track hard. They have a following and I like them too. They look all business. I'm on my 3rd set of Stoptech rotors on the front. (spider cracking from heat) Same slotted rotors on the back for years. (the front does most of the stopping) Plain, slotted, drilled, or drilled and slotted will all crack with enough heat and abuse. I've read about the plusses an negatives of the options. Based on my experience hardly anyone will use their brakes hard enough on the street to damage whichever is used. You will overheat the stock brake fluid and get a soft pedal long before overheating the rotors. So pick your favorite style and be happy. (plain is preferred for racing ….. more material to absorb heat)

Les