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JE Pistons 218591 Forged Piston Set Bore Alloy - 4.030 2618 8-Cylinder

Part of: JE Pistons Forged Piston Set Bore Alloy

Other options in this family: JE Pistons 338094 JE Pistons 291062 JE Pistons 279946 JE Pistons 314303 JE Pistons 357429

Manufacturer

Picture for manufacturer JE Pistons

Part Number

218591
5 reviews
Sale Price

$1,096.99

Estimated ship date Wednesday, November 11

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Product Details

The JE Pistons 218591 is a high-performance forged piston set engineered from 2618 aluminum alloy for demanding racing and high-output applications. This 8-piston set features a 23-degree inverted dome/dish design with a 4.030-inch bore, 1.250-inch compression distance, and 0.927-inch pin diameter, making it compatible with 3.480-inch and 3.500-inch stroke crankshafts.

Key Features:

  • Application-specific forgings with optimized, uniform crown thickness for maximum strength
  • Contact reduction groove to minimize frictional drag and improve efficiency
  • Accumulator groove for increased top ring stability and superior sealing
  • CNC-machined side relief with lower support band for additional skirt strength
  • Honed pin bores with double pressure-fed pin oilers for enhanced lubrication
  • Oil rail support included for improved oil control
  • Wire locks included with each piston

JE Pistons are precision-matched and sold as complete sets to ensure balanced performance. For over 60 years, JE Pistons has been the industry leader in forged racing pistons for Chevy, Ford, Mopar, and Buick engines. Recommended ring set: J100F8-4030-5.

Products specifications

Block Height

9

Bore (in)

4.030 in.

Bore (mm)

102.362mm

CID

355

Comp Ratio @ 58CC

8.9:1

Comp Ratio @ 64cc

8.4:1

Comp Ratio @ 76CC

7.6:1

Compression Distance (in)

1.250 in.

Dome Volume

-26

Gram Weight

458

Notes

Oil rail support included. 0.310 in. deep valve pockets.

Oversize

0.025

Pin Diameter (in)

0.927 in.

Piston Head Volume (cc)

+26.00cc

Piston Material

Forged aluminum

Piston Ring Thickness

1/16 in. x 1/16 in. x 3/16 in.

Piston Style

Dish, with a D-shaped cup

Quantity

Sold individually.

Rod

6

Stroke

3.5

Wrist Pin Style

Press-fit or floating

Add-On

927-042-CS

Top Compression Ring Thickness

0.064

Forging Type

Round

Piston Material

2618

Piston Avg Wt

465

Piston Head Type

Dish

Cylinder Head

CHEVROLET 23 DEG 20/30

Make

Chevrolet

Second Compression Ring Thickness

0.064

Piston Pin Wall Thickness

0.150

Compression Height

1.250

Product Market

Domestic

Piston Pin Material

5115

Ringset Included

No

Category Hierarchy

Pistons>Piston Kits

Piston Pin Length

2.950

Engine

SMALL BLOCK CHEVROLET

Oil Ring Thickness

0.218

Out of Stock Message

Call for Availability

Industry

Automotive

Add-On

J100F8-4030-5

Piston Volume

-24.7

Piston Pin Outside Diameter

0.927

Bore Diameter

4.030

Add-On

927-2950-15-51S

Wrist Pin Outer Diameter

0.927

Piston Quantity

8

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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