This is the airfilter Twin Motorcycles tested and used for there Harley Davidson stage 1 Sportster KIT look here for the testing info. on the 1200 and 883.
It fit's al Harley Davidson Sportsters from 2004-2011 models.
this version comes with Wrinkle black fittings and airfilter cover
Chrome version / stainless mesh airfilter, with Black wrinkle finish and airfilter cover