JE Pistons for Subaru STI EJ257 83mm Stroker 99.75mm Bore CR 8.5 KIT Set of 4 Pistons

DIMS: 10.25 x 5.75 x 5.5

SUB: Forged EJ Pistons

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import and sport compact applications. Engineered, forged and machined 100% in the USA, JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons’ performance is proven in victory lane time and time again. Equip your engine with the best in forged pistons.

Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications

Designed specifically for each engine and use application to provide optimized performance durability

Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
Skirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise

Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power
Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings

Made 100% in the USA

Spec:

• Bore Diameter 99.75
• Compression Height 1.130
• Piston Head Type Dish
• Piston Volume -21.10
• Cylinder Head EJ257 STI
• Second Compression Ring Thickness 0.0480
• Oil Ring Thickness 0.0995
• Piston Material 2618

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