Originally Posted by ConnClark

Ummm... IMHO the ARV is worse than the EGR as it keeps your boost low. In fact without EGR the ARV provides no benifits in emissions what so ever. It even makes them worse because it dumps air out of the turbo that you burned fuel to compress.

Best performance No EGR and No ARV.
Worst performance working EGR and ARV

Best emissions working EGR and ARV
Worst emissions No EGR and working ARV