I just got plugs from NAPA. Dang thing wets the plugs if you pedal it when cranking and the engine is cold. Originals NGK's are BKR6E. I replaced them with BKR6EIX. The iridium plug was $8 and some change each. 1997 Hijet 660. Can also look here under non-us automotive: http://www.ngk.com/Default.asp