JE Pistons 379457 FSR Ultra Series Piston Kit Bore Compression - 93mm 9.0 1

The JE Pistons 379457 FSR Ultra Series Piston Kit is a complete high-performance piston solution engineered for Polaris RZR XP Turbo applications. This premium kit features a 93.00mm standard bore size with a 9.0:1 compression ratio, specifically designed to handle the extreme demands of forced induction and high-horsepower naturally aspirated engines.

Advanced Forging Technology:

• Proprietary Aligned Grain Flow Technology directs aluminum grain flow around critical piston areas for maximum strength
• Constructed from high-quality 2618-T6 forged aluminum alloy for superior durability
• In-house forging and CNC machining ensures precise quality control

Performance-Enhancing Features:

• Lateral gas ports channel combustion gases behind the top ring groove for improved ring seal in boosted applications
• Ultra-thick ring lands maintain ring stability under high cylinder pressures
• Thermal Barrier Crown Coating reduces heat transfer into piston material, decreasing fatigue and improving longevity
• Tuff Skirt proprietary moly-based dry film coating reduces operating friction for better wear resistance
• Accumulator groove traps unwanted gases below the top ring to maintain optimal ring seal
• Double pin oilers provide superior lubrication to the wrist pin and pin bore

Complete Kit Includes:

• All necessary pistons for complete engine rebuild
• Piston rings engineered for high-performance applications
• Upgraded 9310 steel wrist pins designed to withstand additional loads of forced induction
• Wire locks for secure pin retention

This complete piston kit delivers the strength, reliability, and performance demanded by serious powersports enthusiasts and racers. JE Pistons' seven decades of professional racing experience ensures this kit meets the highest standards for durability and power output.