JE Pistons 400 Small Block 18 Degree Dome 218593L Pistons, Single - 400SBC 18DEG DOME

SKU: JEP218593L

Pistons

JE Pistons

JE Pistons 400 Small Block 18 Degree Dome 218593L Pistons, Single - 400SBC 18DEG DOME

SKU: JEP218593L

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 400 small block 18 degree dome pistons feature a new dome profile to match a wider variety of 18 degree heads. They're designed to fit your high-compression, high-horsepower, 17/18 degree dirt late model engine. They have smooth flowing domes for optimum flame travel and angle milled head compatibility. New valve reliefs will accommodate larger valves and long-duration, tight lobe separation cams. These pistons utilize dedicated left and right hand forgings and accept 1/16, 1/16, 3/16 rings.

Part Type

Pistons

Data: v4.2 - Upd: 2026-10-14 11:05:50

Specifications

Product Attributes - Brand: JE Pistons
Product Attributes - Manufacturer's Part Number: 218593L
Product Attributes - Part Type: Pistons
Product Attributes - Product Line: JE Pistons 400 Small Block 18 Degree Dome Pistons
Product Attributes - UPC: 193564193629
Product Attributes - Piston Rings Included: No
Product Attributes - Bore (in.): 4.125 in.
Product Attributes - Bore (mm): 104.775mm
Product Attributes - Stroke: 3.750 in.
Product Attributes - Engine Stroke Type: Stock
Product Attributes - Actual Engine Displacement: 6.6L/401
Product Attributes - Rod Length: 6.000 in.
Product Attributes - Piston Style: Dome, with two valve reliefs
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Compression Height (in.): 1.125 in.
Product Attributes - Piston Head Volume (cc): +2.50cc
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.): 0.927 in.
Product Attributes - Piston Ring Thickness: 1.25mm x 1.50mm x 3.00mm
Product Attributes - File Fit: No
Product Attributes - Gapless: No
Product Attributes - Top Ring Thickness: 1.25mm
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: Designed to fit left exhaust valve orientation. Oil rail support included.

Reference Information

Brand Name/s	JE Pistons
StreetFX SKU	jep218593L
SFX Item ID	4802652
Supplier Item Code	4802652
Manufacturer SKU	218593L
Manufacturer UPC	193564193629
Alternative References	400SBC, 18DEG

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. Oil rail support included.