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: Two-Piece - Symmetric Head Outside Diameter (mm): 128 Head Outside Diameter (in): 5.04 Head Thickness (mm): 43 Head Thickness (in): 1.69 Pilot Outside Diameter (mm): 70.5 Pilot Outside Diameter (in): 2.78 Inside Diameter (mm): 36.2 Inside Diameter (in): 1.42 Mount Height (mm): 57 Mount Height (in): 2.24 Bonded Sleeve: Yes Standard Bolt Size: M30