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6.9 / 7.3 Glowplugs "Instant-Heat" glow plugs for all 12 volt 6.9 and 7.3 IDI diesels. MADE IN USA to our specifications by the manufacturer that supplies the US Forces glow plugs for the Hum-Vee's overseas fighting in Iraq for our freedom. These glow plugs will not burn out or swell if overheated and heat up almost twice as fast as the stock oem's. The images below show the difference in heating rates for the same style glow plug on the 6.5.

Many ask since they heat faster, will they burn out faster? No, these plugs are self regulating and will last as long if not longer then any stock plug!