Is anyone still making those adapter brackets? Also couldn't I put my airbox back on when I gonna be muddy trail riding, cause I do plan on doing that in the bikes life with me. Would I need to run outerwears with the k&n? I'm not going duning since there aren't any dunes in Ohio an if I go duning ill put the air box back on with a uni filter. Mainly with the airbox off all ill be doing is drag racing dirt and grass field drags.