Cat fuel injector nozzles utilize specialized product metallurgy, proprietary manufacturing processes and design, to deliver injectors capable of meeting today's performance and injection pressures for emissions requirements. Mount Type: Cup Mount Overall Length (mm): 66.0 Overall Length (in): 2.60 Cup Outside Diameter (mm): 104.9 Cup Outside Diameter (in): 4.13 Cup Inside Diameter (mm): 50.8 Cup Inside Diameter (in): 2.00