If i remember correctly i don't think that would be the case, Ruf didn't have power stages yet at that time. Either the customer didn't opt for the inlets or this may not be a RUF VIN CTR but instead a full RUF conversion to CTR spec. Of course i can't tell from the pics if its one or the other but that would be my explaination.
A pic of a CTR in for restoration prior to hand over to new owner. This is a RUF VIN CTR and photo was taken while i was visiting RUF for the day. Notice no air inlets.
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2006 Porsche Boxster S/Atlas Grey Metallic/Black/Black/6 spd
Canon 30D/17-85 IS/70-200 4L IS/580EXII/430EX/B+W Filters