Air compressors provide air supply to different parts of the engine where needed Mount Type: Two-Piece - Symmetric Head Outside Diameter (mm): 144.1 Head Outside Diameter (in): 5.67 Head Thickness (mm): 31.5 Head Thickness (in): 1.24 Pilot Outside Diameter (mm): 70 Pilot Outside Diameter (in): 2.76 Inside Diameter (mm): 48 Inside Diameter (in): 1.89 Mount Height (mm): 50 Mount Height (in): 1.97 Bonded Sleeve: No Standard Bolt Size: M24