Iv seen posts on how to do it etc and problems, but what I want to know is how will it benefit the vehicle and what results will I have? The science Behind it I suppose

Cheers

The engine consuming already burnt sooty exhaust gases can never be good. Those carbons stick to the intake etc eventually building up to restrict airflow.

Have you used a delete kit where you just blank it off or have you removed the egr cooler and rejigged the pipe work? Cheers btw