ok i have eric's tunes on the way done 4" all the way, cold side pipe, and the S&B. I am a little in the grey about the block off plates. i read as much as i can on here, and hear this and that about pucking. spent abunch so far and wondering about the plates. can i run them long enough to save for the full EGR delete? or am i wasting my time and motor on the plates?