I installed my roto-fab last week and could not agree more. I was impressed also by the foam packaging. Great fit and finish. Great gains also as per other recent posts.
2013 Ashen gray ZL1 M6 with Roto-fab, Vmax TB, Pfadt headers, 10% pulley, JRE tuned. 11.459 @125mph. 566hp/517tq.