This has been discussed in depth numerous times in the past. Actually, I planned to do it myself, but never did because it doesn't provide any HP gains of any kind. The only advantage to doing an EGR delete is a cleaner engine bay. Aside from the obvious things like capping and rerouting things, etc, the car also has to be tuned for it, or else it'll start throwing codes. Also something to keep in mind, you will fail emissions if you're located in a state or locale that does testing.