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Ultra Series 99.75mm Bore 9.5:1 CR Set of 4 Pistons - For Subaru EJ257

$1,124.99

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Details

  • SKU: 361331
  • Manufacturer: JE PISTONS

Description

For Subaru EJ257

  • 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 Ultra Series Piston Kit is designed for high-horsepower Subaru EJ257 engines. This set includes four forged pistons with a 99.75mm bore and a 9.5:1 compression ratio. Engineered for extreme performance, these pistons feature JE's proprietary Aligned Grain Flow forging technology, enhancing tensile strength to withstand high cylinder pressures. A thermal barrier crown coating helps reflect heat into the combustion chamber, reducing piston temperatures and improving exhaust gas scavenging. The skirt coating minimizes friction and wear while reducing operating noise, particularly during cold starts. Additional performance features include lateral gas ports for maintaining ring seal under high RPM and boost conditions, as well as optimized pin oiling to reduce heat and wear. The kit also includes high-strength, thick-wall wrist pins designed to handle the demands of high-performance engine builds. Ideal for high-boost and power-adder applications, JE Ultra Series Pistons offer durability and advanced engineering for racing and high-performance street builds.





This product was added to our catalog on Thursday 22 February, 2024.




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