My 996 came with the k&n already installed. I removed it recently while doing my water pump. When reinstalling, i found the rubber well nuts that the bottom bolts to were rotted to death. Are these well nuts from the k&n kit? Or were rhey a factory part? Trying to find replacements?
Its the rubber well nuts that the bolts in the pic would screw into.

 

Just replaced a few of these rubber nuts. They are used in the frunk to anchor the factory cd stacker as well as the panels on either side of the battery. Dealer should be able to order these for you.

 

Jeremy: If bushrat is correct this is the "rubber nut" that holds the side panels in the frunk in place. I cannot verify this is what you need.

part #99950009200
Number 13 in diagram. $4.41 from Auto Atlanta

http://beffc355b172a4d82d12-6d84f9e6...com/813-20.gif

 

Not sure if they are the same size. These are pretty big, looks,like 1/4" size bolt

 

Try this part# 99950007800 1/2" body,6mm thread (apx 1/4")