SUB STI EJ257 99.5mm Bore CR 9.5 KIT Set of 4 Pistons

$899.99

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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 99.5mm Bore CR 9.5 Kit is a premium set of four forged pistons designed for high-performance applications. Precision-engineered from 2618 aluminum, these pistons provide exceptional durability and strength to handle demanding conditions. Key features include a proprietary Forged Side Relief (FSR) design that reduces friction, minimizes power loss, and saves weight with a shorter wrist pin. The pistons may feature a skirt coating to reduce friction and wear, lower operating noise, and improve cylinder wall protection. An accumulator groove (if applicable) enhances ring seal and reduces ring flutter for consistent power delivery. Each piston kit includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings, ensuring a complete and reliable setup. Designed specifically for the Subaru EJ257 engine, these pistons have a 99.5mm bore and a 9.5:1 compression ratio with an inverted dome/dish design for improved performance. Perfect for a variety of motorsport applications, JE Pistons are trusted for their proven performance on the track. Whether you're building for drifting, drag racing, or other high-power uses, this piston kit delivers the optimal balance of strength, reliability, and efficiency.