JE Pistons 400 Small Block 23 Degree Flat Top 181942L Pistons, Single - 4.155 SBC FT

SKU: JEP181942L

Pistons

JE Pistons

JE Pistons 400 Small Block 23 Degree Flat Top 181942L Pistons, Single - 4.155 SBC FT

SKU: JEP181942L

Pistons

BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.

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Description

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 04:09:42

Data: v4.2 - Upd: 2026-11-09 07:05:08

Features

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.

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Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s	JE Pistons
StreetFX SKU	jep181942L
SFX Item ID	4806368
Accounting SKU	jep-181942L
Manufacturer SKU	181942L
Manufacturer UPC	193564188953
Alternative References	181942L, JEP-181942L

Pistons, Single - 4.155 400 SBC FT

JE Pistons offers 400 small block 23-degree flat top pistons for a wide range of applications, including many Chevy vehicles from 1967 and up. These single replacements are forged using 2618 aluminum, yielding high tensile strength needed for high-demand performance. The pistons are designed specifically for each engine.

Additional details:
• 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
• Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power

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. 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.

Product Attributes
Brand	JE Pistons
Manufacturer's Part Number	181942L
Part Type	Pistons
Product Line	JE Pistons 400 Small Block 23 Degree Flat Top Pistons
UPC	193564188953
Piston Rings Included	No
Bore (in.)	4.155 in.
Bore (mm)	105.537mm
Stroke	3.500 in.
Engine Stroke Type	De-Stroked
Actual Engine Displacement	6.2L/380
Rod Length	6.000 in.
Piston Style	Flat top, with two valve reliefs
Piston Material	Forged aluminum
Compression Height (in.)	1.250 in.
Piston Head Volume (cc)	+4.30cc
Wrist Pin Style	Press-fit or floating
Wrist Pin Retainers Included	Yes
Wrist Pin Included	Yes
Pin Diameter (in.)	0.927 in.
Piston Ring Thickness	0.064 in. x 0.064 in. x 0.188 in.
File Fit	No
Gapless	No
Top Ring Thickness	0.064 in.
Second Ring Thickness	0.064 in.
Oil Ring Thickness	0.188 in.
Remanufactured	No
Quantity	Sold individually.
Notes	Designed to fit left exhaust valve orientation with 20/30 valve spacing. Also fits 3.480 in. stroke engines.