Wiseco S743 Piston Wrist Pin 20.1mm x 50.8mm E52100 Tool Steel Unchromed

The Wiseco S743 is a high-performance piston wrist pin engineered for powersports and motorsport engine applications. Measuring 20.1mm in outer diameter × 50.8mm in length × 14.1mm wall thickness, this precision-machined pin is manufactured from E52100 tool steel — a high-carbon chromium bearing steel renowned for its exceptional hardness, wear resistance, and fatigue strength under extreme cyclic loading.

Key Features:

• Material: E52100 high-carbon chromium tool steel for superior hardness and wear resistance
• Dimensions: 20.1mm outer diameter × 50.8mm length × 14.1mm wall thickness
• Unchromed finish for precise bore fitment
• Engineered to handle the extreme forces transferred between the piston and connecting rod
• Lightweight hollow design reduces reciprocating mass for improved engine response
• Compatible with Wiseco performance pistons as well as many OEM pistons requiring the same pin dimensions
• Sold individually

Wiseco wrist pins are a trusted choice for engine builders seeking a reliable, performance-grade replacement or upgrade pin. Whether rebuilding a stock engine or assembling a high-output performance build, the S743 delivers the strength and dimensional accuracy needed for a long-lasting, dependable piston assembly.