double hood scoop hardware needed

I think what you have is factory. The "plug" fits through the holes in the hood so that the scoops will set flat on the hood. I agree that you should get the stud and nut kit. You coud cheet and get simaular stud at the hardware store but I was afraid that they wouldn't hold.
http://www.rtspecialties.net/proddetail.asp?prod=1601075F