Hi Marlayne et al
Norman Hyde here in UK is doing a re-usable, washable "DNA" air filter that fits in the stock airbox. Part number is HBK 352 for the America/Speedmaster. It is an oiled fabric metal mesh construction very similar to a K&N air filter. Norman is selling this item for £36.00 (about $65). I am going to fit one to my SM this weekend - will go up 2 sizes on main jets to 114's. Norman Hyde has a web site
www.normanhyde.co.uk. Have a look
Regards
Jan
