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JE Pistons 258251 Forged Dome Piston Set Bore Alloy - 4.625 2618 8-Cylinder

Part of: JE Pistons Forged Dome Piston Set Bore

Other options in this family: JE Pistons 353906 JE Pistons 186235 JE Pistons 359152 JE Pistons 361278 JE Pistons 182027

Manufacturer

Picture for manufacturer JE Pistons

Part Number

258251
7 reviews
Sale Price

$1,076.99

Estimated ship date Sunday, November 15

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Product Details

JE Pistons 258251 is a complete 8-cylinder forged piston set engineered from 2618 aluminum alloy for high-performance and racing applications. This dome piston set features a 4.625-inch bore diameter, 1.270-inch compression distance, and accepts a 0.990-inch wrist pin. Built with JE's proprietary forging process, these pistons deliver exceptional strength and durability under extreme combustion pressures.

Advanced Engineering Features:

  • Application-specific forgings ensure optimized, uniform crown thickness for consistent heat distribution
  • Contact reduction groove minimizes frictional drag for improved power output
  • Accumulator groove increases top ring stability and sealing performance
  • CNC-machined side relief with lower support band adds skirt strength and prevents piston rock
  • Precision-honed pin bores with double pressure-fed pin oilers for enhanced lubrication
  • Wire locks included for secure pin retention

Each set includes JE ProSeal piston rings specifically matched to these pistons. All JE Pistons are sold as precision-matched sets to ensure balanced performance across all cylinders. Ideal for serious racers and engine builders demanding maximum reliability and performance from their powerplant.

Products specifications

Block Height

9.78

Bore

4.625

CID

571

Comp Height

1.27

Comp Ratio @ 110cc

14.8:1

Comp Ratio @ 118cc

13.6:1

Comp Ratio @ 124cc

12.8:1

Dome Volume

37

Gram Weight

641

Oversize

0.155

Rod

6.385

Stroke

4.25

Industry

Automotive

Top Compression Ring Thickness

0.064

Piston Avg Wt

635

Out of Stock Message

Call for Availability

Second Compression Ring Thickness

0.064

Engine

BIG BLOCK CHEVY

Add-On

990-2930-15-51S

Piston Volume

37

Piston Pin Wall Thickness

0.150

Oil Ring Thickness

0.218

Piston Pin Length

2.930

Make

Chevrolet

Piston Material

2618

Cylinder Head

OPEN CHAMBER

Piston Pin Outside Diameter

0.990

Forging Type

Round

Add-On

J10008-4625-5

Product Market

Domestic

Ringset Included

No

Category Hierarchy

Pistons>Piston Kits

Bore Diameter

4.625

Piston Head Type

Dome

Compression Height

1.270

Add-On

990-042-CS

Piston Pin Material

5115

Piston Quantity

8

Prop 65

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

They have the best prices and fast shipping too.

I found them doing a search for a clutch kit, they are hands down one of the easiest companys to work with and the prices cant be beat..... I looked everywhere

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!

Great price!

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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