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JE Pistons 257955 Forged Piston Set Bore Alloy - 4.600 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

257955
6 reviews
Sale Price

$1,076.99

Estimated ship date Wednesday, November 11

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Product Details

The JE Pistons 257955 is a premium forged piston set engineered from 2618 aluminum alloy for high-performance applications. This 8-piston set features a 4.600-inch bore diameter, 1.520-inch compression distance, and 0.990-inch pin diameter with inverted dome/dish crown design for optimized combustion chamber geometry.

Key Features:

  • Application-specific forgings deliver optimized, uniform crown thickness for maximum strength and heat resistance
  • Contact reduction groove minimizes frictional drag for improved horsepower
  • Accumulator groove increases top ring stability and sealing performance
  • CNC-machined side relief with lower support band provides additional skirt strength and durability
  • Honed pin bores ensure precise pin fit and reduced wear
  • Double pressure-fed pin oilers improve lubrication for extended component life
  • Wire locks included for secure pin retention
  • JE ProSeal piston rings included with each set

JE Pistons has been the industry leader in forged racing pistons for over 60 years, trusted by professional engine builders and racers worldwide. All JE pistons are sold as precision-matched sets to ensure balanced performance across all cylinders.

Products specifications

Block Height

9.78

Bore

4.6

CID

565

Comp Height

1.52

Comp Ratio @ 110cc

9.2:1

Comp Ratio @ 118cc

8.8:1

Comp Ratio @ 124cc

8.5:1

Dome Volume

-20

Gram Weight

670

Oversize

0.125

Rod

6.135

Stroke

4.25

Add-On

990-2930-18-51S

Piston Pin Material

5115

Cylinder Head

OPEN CHAMBER

Piston Avg Wt

662

Piston Material

2618

Piston Pin Length

2.930

Piston Pin Outside Diameter

0.990

Oil Ring Thickness

0.188

Product Market

Domestic

Piston Volume

-20

Engine

BIG BLOCK CHEVY

Add-On

990-042-CS

Top Compression Ring Thickness

0.064

Industry

Automotive

Piston Pin Wall Thickness

0.180

Category Hierarchy

Pistons>Piston Kits

Forging Type

Round

Ringset Included

No

Add-On

J100L8-4600-5

Make

Chevrolet

Out of Stock Message

Call for Availability

Piston Head Type

Dish

Second Compression Ring Thickness

0.064

Compression Height

1.520

Bore Diameter

4.600

Prop 65

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

Piston Quantity

8

They have the best prices and fast shipping too.

Great price and fast shipping!

Best price I could find! Great customer service kept me informed through the whole order process to insure acuracy since it was being sent directly from the manufacture. Recieved my order in good time, right parts and no damage. Overall very satisfied and will be doing business again in the future.

Very competitive low prices and great product selection. Will definitely look to this vendor when purchasing automotive parts in the future.

iS THE THROWOUT BEARING INCLUDED?

Although there was a mix up with the shipping on my order customer service was helpful and expedited the solution and made it worth my trouble. I will be keeping Autoplicity in mind for any other parts I might need for my Jeep.

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