Yo compré estas:
http://www.ebay.es/itm/NGK-IRIDIUM-IX-SPARK-PLUG-DCPR9EIX-APRILIA-RSV-Mille-Tuono-Rac-ing-03-04-2316-/290663392579?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43ace36543#ht_2289wt_952