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JE Pistons 258025 Forged Piston Set Bore Alloy Flat Top - 4.035 2618 8-Pack

Manufacturer

Picture for manufacturer JE Pistons

Part Number

258025
4 reviews
Sale Price

$1,176.99

Estimated ship date Friday, November 06

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Product Details

JE Pistons 258025 is a premium forged piston set engineered for high-performance automotive applications. Manufactured from 2618 aluminum alloy, these pistons deliver exceptional strength and thermal stability under extreme combustion pressures and temperatures, making them ideal for racing and forced induction builds.

Key Specifications:

  • Bore Size: 4.035 inches
  • Compression Distance: 1.550 inches
  • Wrist Pin Diameter: 0.927 inches
  • Crown Design: Flat top with 23-degree inverted dome
  • Material: 2618 forged aluminum alloy
  • Stroke Compatibility: 3.480 and 3.500 inch
  • Recommended Ring Set: J70008-4030-5

Advanced Features:

  • FSR (Free Standing Rib) forging technology for optimized, uniform crown thickness
  • Tour Series gas porting for improved ring seal and reduced blow-by
  • Contact reduction groove minimizes frictional drag for increased horsepower
  • Accumulator groove enhances top ring stability and sealing performance
  • CNC-machined side relief with lower support band for additional skirt strength
  • Precision-honed pin bores for accurate fit and reduced wear
  • Double pressure-fed pin oilers ensure consistent lubrication
  • Wire locks included for secure pin retention

Each set contains 8 matched pistons carefully balanced for smooth operation and reduced vibration. JE Pistons has been the trusted choice of engine builders and racers for over 60 years, delivering proven performance across Chevrolet, Ford, Mopar, and Buick platforms.

Products specifications

Block Height

9

Bore

4.035

CID

358

Comp Height

1.545

Comp Ratio @ 58CC

11.2:1

Comp Ratio @ 64cc

10.4:1

Comp Ratio @ 76CC

9.5:1

Dome Volume

-5

Gram Weight

389

Oversize

0.035

Rod

5.7

Stroke

3.5

Bore Diameter

4.035

Forging Type

FSR

Piston Pin Wall Thickness

0.150

Add-On

927-2350-15-51C

Piston Material

2618

Second Compression Ring Thickness

0.044

Compression Height

1.550

Top Compression Ring Thickness

0.0436

Oil Ring Thickness

0.119

Add-On

927-073-MW

Cylinder Head

CHEVROLET 23 DEG 20/30

Product Market

Domestic

Piston Pin Outside Diameter

0.927

Add-On

J71408-4030-5

Piston Volume

-4.1

Piston Pin Material

5115

Category Hierarchy

Pistons>Piston Kits

Industry

Automotive

Engine

SMALL BLOCK CHEVROLET

Piston Head Type

Flat

Ringset Included

No

Out of Stock Message

Call for Availability

Piston Pin Length

2.350

Make

Chevrolet

Piston Avg Wt

389

Prop 65

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

Wrist Pin Outer Diameter

0.927

Piston Quantity

8

Best price by far! Fast shipping!

Ordered parts for my civic. Great site, lowest prices (trust me I looked) and great service. Will definitely buy again from them.

"Excellent price and great customer service. Order was shipped promptly!! Would do business with them again. "

Item just as descibed, great price and fast shipping. This has been my first order and actually first time searching for an auto part on this site and all went as expected. Glad I saw reference to it a car forum.

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