JE Pistons Subaru EJ Series 310927L Pistons, Single - SUB 8.8:1 BILLET KIT

SKU: JEP310927L

Pistons

JE Pistons

JE Pistons Subaru EJ Series 310927L Pistons, Single - SUB 8.8:1 BILLET KIT

SKU: JEP310927L

Pistons

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Description

JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import, and sport compact applications, and they have been performance-proven in victory lane time and time again.

JE Pistons Subaru EJ Series pistons are single replacements. Available in different bore sizes for right or left, the pistons are specifically engineered for extreme applications up to, and including, professional competition. In such environments, the higher compression ratios and boost necessitate the high-tensile strength of forged 2618 aluminum construction. The skirts feature a proprietary Forged Side Relief (FSR) forging design that minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin. High-quality wrist pins, locks, and piston rings are included. Equip your engine with the best in forged pistons—JE Pistons.

Part Type

Pistons

Data: v4.2 - Upd: 2026-10-14 11:03:39

Specifications

Product Attributes - Brand: JE Pistons
Product Attributes - Manufacturer's Part Number: 310927L
Product Attributes - Part Type: Pistons
Product Attributes - Product Line: JE Pistons Subaru EJ Series Pistons
Product Attributes - UPC: 193564016942
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/150
Product Attributes - Rod Length: 130.500mm
Product Attributes - Piston Style: Dish, with a trough
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Compression Height (in.): 1.210 in.
Product Attributes - Piston Head Volume (cc): -14.10cc
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: 0.048 in. x 0.048 in. x 0.100 in.
Product Attributes - File Fit: Yes
Product Attributes - Gapless: No
Product Attributes - Top Ring Thickness: 0.048 in.
Product Attributes - Top Ring Material: Carbon steel
Product Attributes - Top Ring Facing Material: Gas nitrided
Product Attributes - Second Ring Thickness: 0.048 in.
Product Attributes - Second Ring Material: Ductile iron
Product Attributes - Second Ring Facing Material: Phosphate coated
Product Attributes - Oil Ring Thickness: 0.098 in.
Product Attributes - Oil Ring Material: Carbon steel
Product Attributes - Oil Ring Tension: Low
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Fits left side exhaust valve orientation, will work with turbocharger or nitrous oxide.

Reference Information

Brand Name/s	JE Pistons
StreetFX SKU	jep310927L
SFX Item ID	4804545
Supplier Item Code	4804545
Manufacturer SKU	310927L
Manufacturer UPC	193564016942

Compatibility

Application Data

Make SUBARU
Beginning Year 2004
Ending Year 2012
Engine Type H4
Engine Family Subaru 4-cylinder
Engine Size 2.5L/2458cc
Application Notes This piston is for the left hand side, can be used with nitrous and turbos.