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JE Pistons 257665 Forged Flat Top Piston Set Bore Alloy - 4.390 2618 8-Cylinder

Manufacturer

Picture for manufacturer JE Pistons

Part Number

257665
8 reviews
Sale Price

$1,016.99

Estimated ship date Sunday, November 15

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Live-in-stock inventory

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Product Details

JE Pistons 257665 is a premium forged piston set engineered from 2618 aluminum alloy for high-performance racing applications. This 8-piston set features a flat top design with a 4.390-inch bore, 1.350-inch compression distance, and 0.990-inch pin diameter, delivering the strength and precision demanded by serious engine builders.

Key Features:

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

Backed by over 60 years of racing piston expertise, JE Pistons are precision-matched sets that deliver the durability and performance required for Chevy, Ford, Mopar, and Buick racing engines. The 2618 aluminum alloy construction provides superior strength at elevated temperatures, making this set ideal for forced induction and high-RPM applications.

Products specifications

Block Height

10.3

CID

520

Comp Height

1.35

Comp Ratio @ 72cc

13.2:1

Dome Volume

-5

Gram Weight

TBA

Rod

6.8

Stroke

4.3

Add-On

990-2930-15-51S

Piston Pin Length

2.930

Piston Pin Outside Diameter

0.990

Second Compression Ring Thickness

0.064

Product Market

Domestic

Piston Head Type

Flat

Add-On

990-042-CS

Compression Height

1.350

Industry

Automotive

Piston Pin Material

5115

Category Hierarchy

Pistons>Piston Kits

Cylinder Head

M-6049-SCJ

Piston Avg Wt

551

Oil Ring Thickness

0.188

Out of Stock Message

Call for Availability

Piston Pin Wall Thickness

0.150

Ringset Included

No

Bore Diameter

4.390

Add-On

J100F8-4390-5

Piston Material

2618

Piston Volume

-6.3

Top Compression Ring Thickness

0.064

Make

Ford

Forging Type

Round

Engine

BIG BLOCK FORD

Prop 65

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

Piston Quantity

8

They have the best prices and fast shipping too.

quick, easy, good coupon code.

So far its good.

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.

Great prices and FAST shipping!! Definitely will buy products here again!

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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