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JE Pistons 258267 Forged Dome Piston Set Bore - 4.320 8-Cylinder

Manufacturer

Picture for manufacturer JE Pistons

Part Number

258267
15 reviews
Sale Price

$1,096.99

Estimated ship date Sunday, November 15

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Product Details

JE Pistons 258267 is a professional-grade forged piston set engineered for high-performance engine builds. This 8-piston set features 2618 aluminum alloy construction with dome-style tops for open chamber applications, a 4.320-inch bore diameter, 1.520-inch compression distance, and 0.990-inch pin diameter. Designed for builders seeking durability and power in racing and performance applications.

Key Features:

  • Application-specific forgings for optimized, uniform crown thickness and strength
  • 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 for additional skirt strength
  • Honed pin bores with double pressure-fed pin oilers for superior lubrication
  • Wire locks included for secure wrist pin retention
  • Sold as matched sets to ensure consistent weight and dimensional tolerances

Recommended ring set: J10008-4320-5. Backed by over 60 years of JE Pistons' leadership in forged racing piston technology for domestic V8 engines.

Products specifications

Block Height

9.78

Bore

4.32

Bore (in)

4.320 in.

Bore (mm)

109.728mm

CID

498

Comp Height

1.52

Comp Ratio @ 110cc

14.4:1

Comp Ratio @ 118cc

13.1:1

Comp Ratio @ 124cc

12.3:1

Compression Distance (in)

1.520 in.

Dome Volume

43

Gram Weight

641

Oversize

0.068

Pin Diameter (in)

0.990 in.

Piston Head Volume (cc)

-43.00cc

Piston Material

Forged aluminum

Piston Ring Thickness

1/16 in. x 1/16 in. x 3/16 in.

Piston Style

Dome, with two valve reliefs

Quantity

Sold individually.

Rod

6.135

Stroke

4.25

Wrist Pin Style

Press-fit or floating

Compression Height

1.520

Piston Head Type

Dome

Piston Material

2618

Add-On

990-2930-15-51S

Bore Diameter

4.320

Piston Pin Wall Thickness

0.150

Product Market

Domestic

Category Hierarchy

Pistons>Piston Kits

Piston Pin Length

2.930

Make

Chevrolet

Piston Volume

43

Piston Pin Material

5115

Top Compression Ring Thickness

0.064

Out of Stock Message

Call for Availability

Add-On

990-042-CS

Industry

Automotive

Ringset Included

No

Oil Ring Thickness

0.188

Piston Avg Wt

621

Piston Pin Outside Diameter

0.990

Add-On

J10008-4320-5

Forging Type

Round

Cylinder Head

OPEN CHAMBER

Second Compression Ring Thickness

0.064

Engine

BIG BLOCK CHEVY

Piston Quantity

8

Prop 65

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

Easy quick and simple.

Quick and easy! My new favorite!

Just haven't been able to attach yet. I will know if it is the correct part, after I work on it.

N/A

Easy as pie

Quick n easy

The fact that I could use my Amazon credentials made the purchase quick and easy.

This place was great. Great service they really helped mr out and were fast and extremely helpful.

Excellent shipping received very fast and well packaged

Incredibly low prices and fast shipping. I bought shocks and struts for my truck and saved more than 35% over what my local parts store wanted!!! I made the mistake of not setting up my account before placing my order so I didn't get confirmation right away, but one quick phone call fixed that. Great customer service.

Lowest price I could find. Cheap shipping for the size. Pretty happy

Very fast shipping and price is rite

Recently ordered a cargo liner and I must say, Autoplicity had the cheapest price anywhere! Excellent communication and super fast shipping! Will definitely do business with Autoplicity again! Thank you for a wonderful shopping experience!

I am impressed with they mail order service. Recommended.

Excellent price on name brand items, best prices for Bosch oxygen sensors.

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