Re: Benefit of EGR valve block?
never noticed any real gain in performance.
yes it does/can when open slightly reduce the egt's.
Remove the manifold cover to get some air round, my manifold cracked because of heat build up because of this, and the 2bar boost it runs does create some heat too.
I wouldn't worry about the slight increase in heat, not unless your well tuned, running big power and creating lots of heats for reasons other than this.
It stops all the crud being recycled back into the engine, the tar build up that you will see if you look into the inlet manifold.