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JE Pistons 258202 Forged Dome Piston Set Bore - 4.610 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 258239

Manufacturer

Picture for manufacturer JE Pistons

Part Number

258202
4 reviews
Sale Price

$1,259.99

1 left at this price

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Product Details

The JE Pistons 258202 is a high-performance forged piston set engineered for serious racing and nitrous applications. Manufactured from 2618 aluminum alloy for superior strength and durability under extreme cylinder pressures, this 8-piston set features a dome design with a 4.610-inch bore, 1.290-inch compression distance, and 0.990-inch pin diameter.

Key Features:

  • 2618 forged aluminum construction for maximum strength in high-boost and nitrous applications
  • Gas ported design for improved ring seal and reduced blow-by
  • Application-specific forgings provide optimized, uniform crown thickness
  • Contact reduction groove minimizes frictional drag for increased horsepower
  • Accumulator groove increases top ring stability and sealing performance
  • CNC-machined side relief with lower support band for additional skirt strength
  • Oil rail support included for enhanced durability
  • Honed pin bores with double pressure-fed pin oilers for superior lubrication
  • Wire locks included
  • Designed for decked block applications

Each set includes 8 precisely matched pistons to ensure balanced performance. Recommended ring set: J860H8-4610-5. Backed by over 60 years of JE Pistons' industry-leading engineering expertise in forged racing pistons.

Products specifications

Block Height

9.8

Bore (in)

4.610 in.

Bore (mm)

117.094mm

CID

568

Comp Ratio @ 110cc

16.1:1

Comp Ratio @ 118cc

14.7:1

Comp Ratio @ 124cc

13.8:1

Compression Distance (in)

1.290 in.

Dome Volume

44

Gram Weight

717

Notes

Oil rail support included.

Oversize

0.14

Pin Diameter (in)

0.990 in.

Piston Head Volume (cc)

-44.00cc

Piston Material

Forged aluminum

Piston Ring Thickness

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

Piston Style

Dome, with two valve reliefs

Quantity

Sold individually.

Rod

6.385

Stroke

4.25

Wrist Pin Style

Press-fit or floating

Ringset Included

No

Oil Ring Thickness

0.218

Add-On

990-2930-18-51S

Out of Stock Message

Call for Availability

Piston Pin Length

2.930

Piston Material

2618

Forging Type

Round

Product Market

Domestic

Piston Avg Wt

715

Add-On

990-042-CS

Bore Diameter

4.610

Category Hierarchy

Pistons>Piston Kits

Engine

BIG BLOCK CHEVY

Compression Height

1.290

Piston Pin Material

5115

Top Compression Ring Thickness

0.0435

Piston Pin Wall Thickness

0.180

Piston Pin Outside Diameter

0.990

Piston Head Type

Dome

Add-On

JG86L8-4610-5

Industry

Automotive

Second Compression Ring Thickness

0.064

Piston Volume

44

Make

Chevrolet

Cylinder Head

OPEN CHAMBER

Prop 65

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

Piston Quantity

8

Great price, exactly what I needed. I will definitely return to Autoplicity for future autoparts orders! Thanks!

Best price fast shipping. will deffinitly order again

My son lives about 1500 miles from me. He had asked me to get him an Industries SuperFlow Hi-Volume Air Compressor for Christmas. <br>With a couple of click on my computer, the compressor was ordered to be shipped to him and was paid for. He had the exact compressor he requested within five days.(and that included the weekend)<br>One word sums up my experience---EASY

Very quick service and lowest price.

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