Has anyone here ever "plugged" up (closed) their EGR port on the engine to improve engine performance? I have a buddy who said he did it on his Prelude and it made a nice difference. (He read about it as a little trick that can be done on all engines to improve Horsepower / Responsiveness).

Anyway, just wanted to know if anyone knew the do's and dont's of this procedure before I try it...

Thanks!!!