Ultra Series 99.50mm Bore Dia -16.5cc 8.5:1 - Piston Set - For Subaru EJ25

$1,124.99

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Details

SKU: 361327
Manufacturer: JE PISTONS

Description

For Subaru EJ25

California Prop 65 Warning: Cancer and Reproductive Harm - https://www.p65warnings.ca.gov/
Type: Piston Set
UPC: 193564045447

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 Ultra Series Piston Set is engineered for high-performance and racing applications, specifically designed for Subaru EJ25 engines. With a 99.50mm bore diameter and -16.5cc inverted dome/dish design, these pistons deliver an 8.5:1 compression ratio, making them ideal for high-boost and power-adder engine setups. Key features include Aligned Grain Flow Technology, a proprietary forging process that enhances tensile strength to meet the demands of extreme engine environments. Thermal barrier crown coating reflects heat back into the combustion chamber, improving efficiency and reducing piston crown temperatures, while a skirt coating minimizes friction, wear, and operating noise. High-strength, thick-wall wrist pins are built to handle the stresses of high-horsepower applications, and lateral gas ports ensure consistent ring seal under high RPM and boost conditions. Enhanced pin oiling further reduces friction, heat, and wear for optimal performance. These pistons are crafted from 2618 aluminum alloy, a material known for its durability and resistance to high temperatures, and are designed specifically for 4-cylinder configurations. JE Ultra Series pistons represent a premium choice for enthusiasts and professionals seeking maximum reliability and performance in their Subaru EJ257 engine builds.