my 02 wg has after market sampson pipes.i bought a stock air filter insert to go it but it has one bolt in the middle. the one on my bike has 5 little screws all around it. i think it has a stage 1 kit because of this and the pipes.any help would be great because the stage1 was my next project.if its not staged on anyone know why it has 5 screws?lol thanks