Instant-Heat glow plugs for all 12 volt 7.3 Powerstroke Diesel's. MADE in the USA to our specifications by the manufacturer that supplies the US Armed forces glow plugs for the humvees. Replaces stock glow plugs with superior performance (They heat up to twice as fast!). These glow plugs will not burn out or swell if overheated like a stock glow plug does.
Because these glow plugs are self regulating they will not burn out and will last longer than any stock plug!