Like the title mentions, we now have the NGK BKR7E Copper Tipped Sparkplugs , that are one range colder than stock and require gapping them at exactly .035 for running a DUB 3.25" Pulley Unit or smaller Supercharger Pulley. Hope this helps, as check them out here:
http://www.southfloridapulleyhq.com/SFPH/rl_csss/ec_ngk.htm
http://www.southfloridapulleyhq.com/SFPH/rl_csss/ec_ngk.htm