JE Pistons 379434 FSR Ultra Series Piston Kit Compression - 86.00mm 13.5 1

The JE Pistons FSR (Forged Side Relief) Ultra Series Piston Kit is engineered for high-performance applications demanding exceptional strength and reduced friction. This kit features a 2.00mm oversize bore, bringing the final diameter to 86.00mm, with a high 13.5:1 compression ratio designed for race and high-output engine builds.

Key Features:

• FSR (Forged Side Relief) design reduces skirt friction and weight while maintaining structural integrity
• 86.00mm bore diameter (2.00mm oversize from standard 84.00mm)
• 13.5:1 compression ratio optimized for race fuel and high-performance applications
• Ultra Series construction uses premium 2618 alloy for superior strength at elevated temperatures
• Precision CNC-machined for exact tolerances and consistent ring seal
• Advanced coating options for reduced friction and improved durability
• Complete kit includes pistons, rings, pins, and locks

JE Pistons FSR Ultra Series pistons are a proven choice for motorsports applications including road racing, drag racing, and high-performance street engines. The 2618 aluminum alloy construction provides exceptional tensile strength and fatigue resistance under extreme cylinder pressures and temperatures.