At $200 this looks like it would perform as well as Gruppe M intake.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7932483064&rd=1
or
http://www.roarfilter.com/
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7932483064&rd=1
or
http://www.roarfilter.com/