Hey guys, I have the Pro-Design air filter kit with the foam set-up (lid on, no snorkel, FMF Fatty's) . I was thinking of switching it to the K&N set-up without the airlid on. Would it be worth it performance wise, since I would have to buy another flange to mount the K&N? Also does anyone know if the foam flange can be modified to accept the K&N filter? Thanks.