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JE Pistons 242930 Forged Piston Set Bore Alloy - 4.250 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

242930
4 reviews
Sale Price

$1,154.99

Estimated ship date Wednesday, November 11

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Product Details

JE Pistons 242930 is a professional-grade forged piston set engineered from 2618 aluminum alloy for high-performance engine builds. This 8-piston set features a 4.250-inch bore diameter, 1.325-inch compression distance, and 0.990-inch pin diameter, designed for demanding racing and performance applications.

Key Features:

  • Application-specific forgings provide optimized, uniform crown thickness for maximum strength and heat dissipation
  • Contact reduction groove minimizes frictional drag for improved horsepower and efficiency
  • Accumulator groove increases top ring stability and sealing capability under extreme conditions
  • CNC-machined side relief with lower support band adds critical skirt strength and stability
  • Precision-honed pin bores ensure proper pin fit and reduced wear
  • Double pressure-fed pin oilers deliver optimal lubrication to the wrist pin
  • Wire locks included for secure pin retention
  • JE ProSeal piston rings included with matched set

Each JE Pistons set is sold as a precision-matched set to ensure consistent compression, weight, and performance across all cylinders. With over 60 years of racing piston expertise, JE Pistons delivers championship-proven reliability for Chevy, Ford, Mopar, and Buick performance builds.

Products specifications

Block Height

10.15

CID

482

Comp Height

1.325

Comp Ratio @ 72cc

10.2:1

Comp Ratio @ 74cc

10.1:1

Comp Ratio @ 88CC

9:1

Dome Volume

-25

Gram Weight

531

Oversize

0.015

Rod

6.7

Stroke

4.25

Piston Pin Length

2.930

Ringset Included

No

Oil Ring Thickness

0.188

Forging Type

Round

Category Hierarchy

Pistons>Piston Kits

Piston Material

2618

Make

Ford

Industry

Automotive

Second Compression Ring Thickness

0.064

Piston Head Type

Dish

Piston Avg Wt

537

Add-On

J100F8-4250-5

Add-On

990-042-CS

Piston Volume

-25

Out of Stock Message

Call for Availability

Piston Pin Outside Diameter

0.990

Product Market

Domestic

Cylinder Head

427/428 FE

Piston Pin Material

5115

Add-On

990-2930-15-51S

Compression Height

1.325

Piston Pin Wall Thickness

0.150

Bore Diameter

4.250

Top Compression Ring Thickness

0.064

Engine

BIG BLOCK FORD FE

Prop 65

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

Piston Quantity

8

They have the best prices and fast shipping too.

Super quick ordering No problems at all. Would do it again.

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.

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