Motorcraft glow plugs ZD-29 for Ford Diesel 7.3 IDI updated from the former part number ZD-9. These glow plugs are genuine from Ford Motor Company and Motorcraft made in Germany. The listing is for individual glow plugs or for a set of eight (8) glow plugs. These are new and OEM. The glow plugs are for 7.3 IDI applications. Shipping options and costs are available once items are placed in the shopping cart and based on your zip code.