JE Pistons 363686S FSR Forged Single Piston

The JE Pistons 363686S is a forged performance piston engineered for demanding V-Twin and powersports applications. Built on JE's proven FSR (Forged Side Relief) platform, this single piston is designed to deliver the strength, durability, and precision fitment that serious engine builders demand.

Key Features:

• 2618 Aluminum Forging — High-tensile aerospace-grade alloy chosen for its superior strength under high heat and pressure cycles
• FSR (Forged Side Relief) Design — Reduced skirt width minimizes friction and parasitic power loss while trimming rotational mass
• Shorter Wrist Pin Boss — Enables use of a lighter, shorter wrist pin for additional weight savings without sacrificing structural integrity
• Precision CNC Machining — Machined to exacting tolerances for consistent ring seal and optimal combustion efficiency
• 100% USA Engineered and Forged — Designed, forged, and machined in the United States
• Single Piston — Sold individually ("S" suffix), ideal for replacement or custom build applications

JE Pistons has over 75 years of experience at the forefront of forged racing piston technology, trusted by top engine builders in NASCAR, NHRA, AMA Supercross, and beyond. The 363686S is a purpose-built component for performance-focused builds where reliability and power output are non-negotiable.