Connecting rod

A connecting rod for coupling a piston to a crank pin, comprising:

• an elongate rod shank with opposite first and second axial ends;
• a small end at the first axial end of the rod shank and adapted to couple to the piston;
• and
• a big end comprising:
• a body part at the second axial end of the rod shank;
• and
• a cap part adapted to releasably couple to the body part, when the cap part is coupled to the body part, the cap part and body part cooperate to define a crank pin receiving bore and abut at first and second spaced apart interfaces that are not orthogonal to a longitudinal axis of the rod shank,
• the cap part defining an aperture proximate the first interface adapted to receive a threaded fastener that engages and clamps the cap part to the body part,
• the cap part comprising a single side protrusion extending radially adjacent said first interface beyond a largest radius from a crank pin bore center to the first interface, the single side protrusion substantially radially concentrated adjacent and parallel to the first interface, and a largest dimension of the connecting rod cap part measured transverse to the longitudinal axis of the rod shank being larger than a largest dimension of the body part measured transverse to the longitudinal axis of the rod shank.