SUB STI EJ257 Block w/ EJ20 Head 100mm Bore CR 8.5 KIT Set of 4 Pistons

$899.99

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Details

SKU: 291060
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 EJ Series Piston Kit is a high-performance upgrade designed for the EJ257 engine block paired with EJ20 heads. Featuring a 100mm bore and an 8.5:1 compression ratio, this set of four pistons is ideal for demanding performance applications. Manufactured from 2618 aluminum for superior tensile strength, the pistons incorporate an advanced Forged Side Relief (FSR) design that reduces friction, minimizes power loss, and saves weight with a shorter wrist pin. The kit includes premium wrist pins, locks, and JE Pro Seal piston rings, ensuring a complete and reliable installation. Engineered for durability and optimized for racing and high-performance use, these pistons feature optional skirt coatings to reduce friction, wear, and operating noise. Additionally, the accumulator groove (if applicable) enhances ring seal and power consistency by reducing ring flutter caused by combustion gas pressure. Perfect for various motorsport applications, including drifting and drag racing, these inverted dome/dish pistons are precision-engineered for the EJ255 and other Subaru EJ-series engines, offering a blend of durability and performance to meet rigorous demands.