Does anyone have the part number that they may have used for a custom intake? I saw a few at the local parts store, but none of them looked close to what pics I have seen. Now that the weather is turning cooler, im thinking of going to an open element. I would like to rig my own with a genuine k&n cone filter so any info, espically part numbers would be greatly appreciated.

 

RC-3600
It's a 4".