JE Pistons 321239L Pistons, Single - GM LS1 FT 6.098 ROD

SKU: JEP321239L

Pistons

JE Pistons

JE Pistons 321239L Pistons, Single - GM LS1 FT 6.098 ROD

SKU: JEP321239L

Pistons

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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 domestic 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 dirt 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

Chevrolet LS1

Part Type

Engine Piston

Data: v4.2 - Upd: 2026-10-14 11:03:52

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 powerMade 100% in the USA

Specifications

Product Attributes - Brand: JE Pistons
Product Attributes - Manufacturer's Part Number: 321239L
Product Attributes - Part Type: Pistons
Product Attributes - UPC: 193564200747
Product Attributes - Piston Rings Included: No
Product Attributes - Bore (in.): 3.898 in.
Product Attributes - Bore (mm): 99.001mm
Product Attributes - Stroke: 3.622 in.
Product Attributes - Engine Stroke Type: Stock
Product Attributes - Actual Engine Displacement: 5.7L/346
Product Attributes - Rod Length: 6.098 in.
Product Attributes - Piston Style: Flat top, with two valve reliefs
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Compression Height (in.): 1.340 in.
Product Attributes - Piston Head Volume (cc): +2.00cc
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.): 0.945 in.
Product Attributes - Piston Ring Thickness: 1.50mm x 1.50mm x 3.00mm
Product Attributes - File Fit: No
Product Attributes - Gapless: No
Product Attributes - Top Ring Thickness: 1.5mm
Product Attributes - Second Ring Thickness: 1.5mm
Product Attributes - Oil Ring Thickness: 3.0mm
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: For the left side of the engine. Made from 2618 alloy forged aluminum.
Product Attributes - Special Attention: Designed to work with LSX/L92 12-degree cylinder heads.

Reference Information

Brand Name/s	JE Pistons
StreetFX SKU	jep321239L
SFX Item ID	4803955
Supplier Item Code	4803955
Manufacturer SKU	321239L
Manufacturer UPC	193564200747
Alternative References	LS1