I'm hoping our cleanmpg resources can help me track down this answer. Is there a compatible EBH for my '99 Civic? The stock 08T44-S01-100 is discontinued and unavailable. I can't confirm but I don't believe there is a difference in the plug diameter or thread size between the stock/unavailable 08T44-S01-100, 08T44-S5B-100 ('01-'05 Civic) or 08T44-SV4-100 ('00-'03 Insight & '00-'02 Accord). Can anyone confirm? Desperately seeking a compatible EBH. Any help would be appreciated.