The connecting rod—often just called a 'con rod'—is the mechanical bridge between the piston and the crankshaft. As fuel combusts and pushes the piston downward, the connecting rod pivots to transfer that force to the rotating crankshaft. It’s a crucial part of the engine’s motion system, turning straight-line movement into the spinning action that powers the vehicle.
Because they endure massive pressure and high-speed motion, connecting rods are built from super-strong materials like forged steel or aluminum. Failure here is rare but catastrophic, often destroying the entire engine if it breaks. Performance engines sometimes use lightweight, high-strength rods for better balance and RPM potential.