Piston Pins

A piston pin, also known as a wrist pin, is a hardened steel pin which connects an engine's piston to a connecting rod. This pin is hollow to reduce weight and is held in place with a number of different methods. Most factory-stock piston pin designs rely on a pressed t with the pin being pressed into the connecting rod. High-performance pistons are typically held in place with wire clips or aluminium buttons.

Engine Valves

Piston Rings

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