I've noticed that the pics for the Barons AIS block off kit no longer include the vacuum tube cover that is mentioned in Redhorse's page. Is this piece no longer needed when removing the AIS,is it something I will have to get on my own, or is it included and just not shown in the pics? Does anyone know of any other kits thatinclude this piece if neccessary? Any info on this would be great. Thanks.