JE Pistons SUB STI EJ257 Block w/ EJ20 Head 99.5mm Bore CR 8.5 (Right Side) Single Piston

SKU: JEP291059R

Pistons

JE Single Pistons

JE Pistons

JE Pistons SUB STI EJ257 Block w/ EJ20 Head 99.5mm Bore CR 8.5 (Right Side) Single Piston

SKU: JEP291059R

Pistons

JE Single Pistons

Sale ends in Calculating... Wed 14 Oct, 2:06 am AEST

IN STOCK! Est Ship 3-5 Days days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

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Description

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import and sport compact applications. Engineered, forged and machined 100% in the USA, JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons? performance is proven in victory lane time and time again. Equip your engine with the best in forged pistons.

Application Summary

Subaru EJ255

Part Type

Engine Piston

Data: v4.2 - Upd: 2026-09-29 05:59:30

Features

Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applicationsDesigned specifically for each engine and use application to provide optimized performance durabilityProprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pinSkirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noiseAccumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent powerIncludes high-quality wrist pins, locks, and JE Pro Seal premium piston ringsMade 100% in the USA

Specifications

Product Attributes - Brand: JE Pistons
Product Attributes - Manufacturer's Part Number: 291059R
Product Attributes - Part Type: Pistons
Product Attributes - Product Line: JE Pistons Subaru EJ Series Pistons
Product Attributes - UPC: 193564019684
Product Attributes - Piston Rings Included: Yes
Product Attributes - Bore (in.): 3.918 in.
Product Attributes - Bore (mm): 99.520mm
Product Attributes - Stroke: 79.00mm
Product Attributes - Engine Stroke Type: Stock
Product Attributes - Actual Engine Displacement: 2.5L/2458cc
Product Attributes - Rod Length: 130.500mm
Product Attributes - Piston Style: Dish, with four valve reliefs
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Compression Height (in.): 1.209 in.
Product Attributes - Piston Head Volume (cc): +25.50cc
Product Attributes - Wrist Pin Style: Press-fit or floating
Product Attributes - Wrist Pin Retainers Included: Yes
Product Attributes - Wrist Pin Included: Yes
Product Attributes - Pin Diameter (in.): 0.905 in.
Product Attributes - Piston Ring Thickness: 1.20mm x 1.20mm x 2.50mm
Product Attributes - File Fit: Yes
Product Attributes - Gapless: Yes
Product Attributes - Top Ring Thickness: 1.2mm
Product Attributes - Second Ring Thickness: 1.2mm
Product Attributes - Oil Ring Thickness: 2.5mm
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Fits EJ257 STI motors. Designed to fit right exhaust valve orientation.

Reference Information

Brand Name/s	JE Pistons
StreetFX SKU	jep291059R
SFX Item ID	4361188
Supplier Item Code	4361188
Manufacturer SKU	291059R
Manufacturer UPC	193564019684
Alternative References	EJ257, EJ20, 99.5mm