I am at a loss. These were ordered for an RS 4.0 (black car in my photo) with the car's VIN from Suncoast or Sunset (can't recall off the top of my head) and were identical to the silver factory-installed uprights that came off the one-owner, low-milage 4.0 so everything was 100% correct when we did the swap. As you stated the part numbers on the packages are also correct so this is all very surprising. Did you put some type or alignment pins through all four mounting holes on your 3.8 upright and these black ones to compare? I appreciated that overlaid in the photos they look pretty much the same but I imagine the mounting holes would only be off very slightly to account for the small change in wing blade angle from the 3.8 to 4.0. If I was duped by the Porsche dealer and given 3.8 uprights in 4.0 packages I will absolutely take them back and refund you but I won't be as excited if I get them back and discover they are in fact the 4.0 parts but the difference was just hard to spot without taking measurement. Thoughts?