JE Pistons 400 Small Block 23 Degree Flat Top 181943L Pistons, Single - 4.165 SBC FT

SKU: JEP181943L

Pistons

JE Pistons

JE Pistons 400 Small Block 23 Degree Flat Top 181943L Pistons, Single - 4.165 SBC FT

SKU: JEP181943L

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

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.

Part Type

Pistons

Data: v4.2 - Upd: 2026-10-14 11:06:16

Specifications

Product Attributes - Brand: JE Pistons
Product Attributes - Manufacturer's Part Number: 181943L
Product Attributes - Part Type: Pistons
Product Attributes - Product Line: JE Pistons 400 Small Block 23 Degree Flat Top Pistons
Product Attributes - UPC: 193564188984
Product Attributes - Piston Rings Included: No
Product Attributes - Bore (in.): 4.165 in.
Product Attributes - Bore (mm): 105.791mm
Product Attributes - Stroke: 3.500 in.
Product Attributes - Engine Stroke Type: De-Stroked
Product Attributes - Actual Engine Displacement: 6.2L/381
Product Attributes - Rod Length: 6.000 in.
Product Attributes - Piston Style: Flat top, with two valve reliefs
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Compression Height (in.): 1.250 in.
Product Attributes - Piston Head Volume (cc): +4.30cc
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.): 0.927 in.
Product Attributes - Piston Ring Thickness: 0.064 in. x 0.064 in. x 0.188 in.
Product Attributes - File Fit: No
Product Attributes - Gapless: No
Product Attributes - Top Ring Thickness: 0.064 in.
Product Attributes - Second Ring Thickness: 0.064 in.
Product Attributes - Oil Ring Thickness: 0.188 in.
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Designed to fit left exhaust valve orientation with 20/30 valve spacing. Also fits 3.480 in. stroke engines.

Reference Information

Brand Name/s	JE Pistons
StreetFX SKU	jep181943L
SFX Item ID	4801983
Supplier Item Code	4801983
Manufacturer SKU	181943L
Manufacturer UPC	193564188984

Compatibility

Application Data

Make	CHEVROLET
Beginning Year	1970
Ending Year	1980
Engine Type	V8
Engine Family	Chevy small block Gen I
Engine Size	6.6L/400
Application Notes	Designed to fit left exhaust valve orientation with 20/30 valve spacing. Also fits 3.480 in. stroke engines.