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JE Pistons 242931 Forged Piston Set Bore Alloy - 4.280 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

242931
6 reviews
Sale Price

$1,176.99

Estimated ship date Wednesday, November 11

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Product Details

JE Pistons 242931 is a premium forged piston set engineered from 2618 aluminum alloy for high-performance racing applications. This 8-piston set features a 4.280-inch bore diameter, 1.325-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 consistent heat distribution
  • Contact reduction groove minimizes frictional drag for improved 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 pin fit and reduced wear
  • Double pressure-fed pin oilers deliver superior lubrication to the wrist pin
  • Wire locks included for secure pin retention
  • JE ProSeal piston rings included with complete piston set

Manufactured from premium 2618 aluminum alloy, these pistons offer exceptional strength and thermal resistance for demanding racing applications. JE Pistons are sold as precision-matched sets to ensure balanced performance across all cylinders. Backed by over 60 years of forged racing piston expertise for domestic V8 engines.

Products specifications

Block Height

10.15

Bore

4.28

CID

489

Comp Height

1.325

Comp Ratio @ 72cc

10.3:1

Comp Ratio @ 74cc

10.2:1

Comp Ratio @ 88CC

9.1:1

Dome Volume

-25

Gram Weight

521

Rod

6.7

Stroke

4.25

Category Hierarchy

Pistons>Piston Kits

Piston Head Type

Dish

Bore Diameter

4.280

Second Compression Ring Thickness

0.064

Piston Volume

-25

Oil Ring Thickness

0.188

Industry

Automotive

Compression Height

1.325

Make

Ford

Add-On

J100F8-4280-5

Piston Pin Wall Thickness

0.150

Product Market

Domestic

Piston Pin Material

5115

Out of Stock Message

Call for Availability

Ringset Included

No

Add-On

990-042-CS

Cylinder Head

427/428 FE

Engine

BIG BLOCK FORD FE

Top Compression Ring Thickness

0.064

Piston Pin Length

2.930

Forging Type

Round

Piston Material

2618

Piston Avg Wt

521

Add-On

990-2930-15-51S

Piston Pin Outside Diameter

0.990

Prop 65

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

Piston Quantity

8

Very nice looking item. Now I just got to get it installed. Prompt shipping and best prices anywhere.

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.

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

Very fast shipping! Lowest prices as well! Will do business 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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