Running httc heads which call for colder plug, ex12p. never been impressed w/splitfires. Crossed them on spark plugs.com and came up w/splitfire number colder than standard twin cam number. cross ref. that plug and came up with autolite 4162 (do like autolites in my evo). Used 4162 to check applications for plug and came up w/v rod. My dealer was totally in dark, checked w/another hd dealer and they stated they use v rod plugs all the time in s/e heads. Question-anyone used either autolite 4162 or v rod (hd) plug in their twin cam s/e heads and any feedback?