JE Pistons SUB WRX EJ20 92.5mm Bore CR 8.5 KIT Set of 4 Pistons

JE Pistons is the leader in forged racing pistons. With 70-plus years of experience, in-house forging, and industry-leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports.

Part Type

Engine Piston Kit

• Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power
• Designed specifically for each engine and use application to provide optimized performance durability
• Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
• Made 100% in the USA
• Patented Dual Velocity Gas Ports combine the benefits of traditional gas ports, reducing ring flutter and movement while optimizing fuel efficiency and power output?without the risk of carbon build-up
• Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
• Skirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Reference Information

Piston, Forged, Dish, 3.642 in. Bore, 1.2mm, 1.5mm, 3.0mm Ring, Subaru, 4-Cylinder, Each

JE Pistons sport compact pistons are specifically engineered for extreme applications, up to and including professional competition. In this environment, the higher compression ratios, highest boost, or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy. Their dome/dish requires no deburring or preparation and features smooth-flowing radii for excellent flame travel. A pin fitting, wire locks, and rings are included.