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): 85.9 Head Outside Diameter (in): 3.38 Head Thickness (mm): 14.3 Head Thickness (in): 0.56 Pilot Outside Diameter (mm): 52 Pilot Outside Diameter (in): 2.05 Inside Diameter (mm): 28.6 Inside Diameter (in): 1.12 Mount Height (mm): 81 Mount Height (in): 3.19 Bonded Sleeve: Yes