Air compressors provide air supply to different parts of the engine where needed Mount Type: Two-Piece - Non-Symmetric Head Outside Diameter (mm): 124 Head Outside Diameter (in): 4.88 Head Thickness (mm): 31.8 Head Thickness (in): 1.25 Pilot Outside Diameter (mm): 64.8 Pilot Outside Diameter (in): 2.55 Inside Diameter (mm): 30.2 Inside Diameter (in): 1.19 Mount Height (mm): 85.9 Mount Height (in): 3.38 Pad Height (mm): 31.8 Pad Height (in): 1.25 Bonded Sleeve: Yes Standard Bolt Size: M24