SUB STI EJ257 99.75mm Bore CR 8.5 KIT Set of 4 Pistons

$899.99

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Details

SKU: 296348
Manufacturer: JE PISTONS

Description

California Prop 65 Warning: Cancer and Reproductive Harm - https://www.p65warnings.ca.gov/
Type: Piston Set

California Restricted

California laws prohibit (in most cases) the use of any aftermarket product whose installation requires the removal of any emissions control related components as regulated by the California Air Resources Board (www.arb.ca.gov).

If an item is designated as "Competition and Racing Vehicles Only", we will require a race waiver be digitally signed before an item can ship to California. If an item is to be exported from California, an export waiver is available as well. This is a REQUIRED guarantee from you that a restricted item will NOT be used on any public highway in California; only on private race tracks in racing or competition use.

The JE Pistons Subaru EJ257 Piston Kit is designed for high-performance and racing applications, offering exceptional durability and optimized performance. The kit includes four forged pistons, crafted from high-strength 2618 aluminum to handle the demands of high-stress environments. With a 99.75mm bore and an 8.5:1 compression ratio (inverted dome/dish design), these pistons are precision-engineered for the Subaru EJ257 engine. The pistons feature JE's proprietary Forged Side Relief (FSR) design, which reduces friction and power loss by minimizing skirt width and utilizing a shorter, lightweight wrist pin. A specialized skirt coating further reduces friction, wear, and operating noise, ensuring smoother performance and extended component life. Additionally, the inclusion of an accumulator groove (where applicable) enhances ring seal and reduces ring flutter for consistent power delivery. Each kit comes complete with high-quality wrist pins, locks, and JE Pro Seal premium piston rings, providing a comprehensive solution for your engine build. Designed for reliability and peak performance, these pistons are trusted by racers across various motorsports disciplines.