I'm no expert but have looked into getting an Adige for my '08 SM510. I believe the P/N you want for the '08 is HU-53. The HU-52 is for the older 450/510. At least that's the information I received from Adige when I inquired.
Here's something that came up when I searched for HU-53. Says it's for 2008.
http://cgi.ebay.it/ws/eBayISAPI.dll?...OMOBOX:ENDSOON
Here's what came up for HU-52. Says 2004-2007. <cut 'n paste of the link didn't work but you get the point>
http://cgi.ebay.it/_Ricambi-e-Accessori-Moto__ADIGE-APTC-FRIZIONE-ANTISALTELLAMENTO-Husqvarna-450-510_W0QQitemZ380087006011QQadiZ8166QQadnZRicambiQ2 0eQ20AccessoriQ20MotoQQcmdZViewItemQQptZRicambi_e_ Accessori_Moto?hash=item380087006011&_trksid=p3286 .c0.m14&_trkparms=72%3A1385|66%3A2|65%3A12|39%3A1| 240%3A1318