The bore may include a first radial inner surface at the first lobe portion and {HEAD ~ a second radial inner surface} at {TAIL ~ the second lobe portion} 
at
The bore may include a first radial inner surface at the first lobe portion and { HEAD ~ a second radial inner surface } at { TAIL ~ the second lobe portion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL