Constructed from 4032 forged alloy with an 11% silicon content, these KB Pistons are formed in a forging press and fully machined to ensure structural integrity. This specific material composition and manufacturing process provide superior crack resistance under conditions of detonation or pre-ignition, making them a robust choice for high-stress environments. The design is suited for both street and race applications, particularly when paired with power adders such as NOS or boost.
For Twin Cam and Sportster applications, the pistons feature coated skirts to optimize performance. Each piston is sold as a pair and includes all necessary rings, wrist pins, and wrist pin locks. It is important to note that wrist pins and locks are sold individually, requiring two locks per piston, while replacement rings are available as a special order.