New product alert!!! This is a Demon, Redeye, Hellcat 19+ filter adapter fits a 7in ID flange filter. I found this Green Filter #7123 works but any 7in flange filter should work.
 
This dose 3 things
 
1: Adapt aftermarket air filters, to fit this platform
2: Adds a velocity stack effect to airpath.
3: Allows the user to remove air filter for track use. (Screen strongly recommended)
 
This is produced by Denver 3D printing and will be 3d printed with a Carbon fiber filled PC+PBT (Polycarbonate + Polybutylene Terephthalate) plastic with an extremely high Glass transition temp around 140C or 284F. No worry about the plastic melting under the hood. 
 
This mount in place of the air filter using the stock air filter screws works with Denver 3D printing intake tube or with factory rubber intake.