JE Pistons 379447 FSR Ultra Series Piston Kit Bore Compression - 92mm 11.0 1

The JE Pistons 379447 FSR Ultra Series Piston Kit is a premium forged racing piston set designed for high-performance and forced induction applications. Featuring a standard 92.00mm bore size and 11.0:1 compression ratio, this kit delivers exceptional strength and reliability for demanding engine builds.

Advanced Forging Technology:

• Proprietary Aligned Grain Flow Technology directs aluminum grain flow around critical piston areas for maximum strength
• 100% CNC-machined from 2618 T6 high-tensile forged aluminum alloy
• Engineered and manufactured entirely in the USA to exacting tolerances

Performance 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 in forced induction and high-horsepower naturally aspirated engines
• Thermal Barrier Crown Coating reduces heat transfer into piston material, decreasing fatigue and improving longevity
• Asymmetrical design with optimized skirt geometry reduces noise and increases piston stability

Complete Kit Includes:

• Forged pistons with smooth-flowing dome/dish design requiring no deburring
• Straight wall carbon steel wrist pins
• Pin fittings and Tru Arc locks

Backed by decades of proven performance in professional racing including NASCAR, NHRA, and AMA Supercross, JE Pistons delivers the ultimate combination of durability and power for serious engine builders and performance enthusiasts.