Amazon recommended the NGK TR6's for my setup and that is what I run. No problems. I run a 2.93 and recently added a second program for the 2.76..will test that tonight at the track.
i believe maoun was running densos and decided to switch after hearing of vindication's denso plugs (5 of 8 "fell apart") giving up the ghost on the dyno. maybe he had a bad set. :shrug: i personally haven't had any problems w/ the ngk's.