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JE Pistons 170818 Forged Piston Set Bore Inverted Dome - 4.155 23 8-Pack

(1970-1980 Chevrolet 400 Small Block)

Part of: JE Pistons Forged Piston Set Bore Inverted Dome

Other options in this family: JE Pistons 257943 JE Pistons 279930 JE Pistons 194888 JE Pistons 297116 JE Pistons 279932

Manufacturer

Picture for manufacturer JE Pistons

Part Number

170818
4 reviews
Sale Price

$1,076.99

1 left at this price

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Usually delivered within 2 days

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Product Details

The JE Pistons 170818 is a professional-grade forged piston set engineered for extreme duty applications. Manufactured from 2618 aluminum alloy for superior strength and durability under high-stress conditions, this 8-piston set features a 23-degree inverted dome crown design optimized for performance engine builds. Each piston is precision-machined to a 4.155-inch bore diameter with a 1.125-inch compression distance and 0.927-inch pin diameter.

Key Features:

  • Application-specific forgings with optimized, uniform crown thickness for consistent heat distribution
  • Contact reduction groove minimizes frictional drag and improves efficiency
  • Accumulator groove increases top ring stability and sealing performance
  • CNC-machined side relief with lower support band for enhanced skirt strength
  • Honed pin bores for precise tolerances and optimal pin fit
  • Double pressure-fed pin oilers ensure proper lubrication
  • Wire locks included with each piston
  • Oil rail support included for improved ring seal and longevity

Recommended ring set: J10008-4155-5. JE Pistons are sold as precision-matched sets to ensure balanced performance. With over 60 years of racing heritage, JE Pistons continues to lead the industry in forged performance pistons for Chevy, Ford, Mopar, and Buick engines.

Products specifications

Fits

1970-1980 Chevrolet 400 Small Block

Block Height

9

Bore

4.155

Bore (in)

4.155 in.

Bore (mm)

105.537mm

CID

407

Comp Height

1.125

Comp Ratio @ 58CC

9.7:1

Comp Ratio @ 64cc

9.2:1

Comp Ratio @ 76CC

8.6:1

Compression Distance (in)

1.125 in.

Dome Volume

-28

Gram Weight

476

Notes

Oil rail support included. 0.310 in. deep valve pockets.

Pin Diameter (in)

0.927 in.

Piston Head Volume (cc)

+28.00cc

Piston Material

Forged aluminum

Piston Ring Thickness

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

Piston Style

Dish, with a D-shaped cup

Quantity

Sold individually.

Rod

6

Stroke

3.75

Wrist Pin Style

Press-fit or floating

Bore Diameter

4.155

Product Market

Domestic

Piston Pin Wall Thickness

0.150

Piston Pin Outside Diameter

0.927

Second Compression Ring Thickness

0.064

Piston Head Type

Dish

Piston Material

2618

Category Hierarchy

Pistons>Piston Kits

Industry

Automotive

Piston Pin Length

2.950

Add-On

927-042-CS

Engine

SMALL BLOCK CHEVROLET

Ringset Included

No

Oil Ring Thickness

0.218

Add-On

927-2950-15-51S

Compression Height

1.125

Out of Stock Message

Call for Availability

Make

Chevrolet

Add-On

J100F8-4155-5

Piston Avg Wt

480

Piston Volume

-26.8

Cylinder Head

CHEVROLET 23 DEG 20/30

Top Compression Ring Thickness

0.064

Piston Pin Material

5115

Forging Type

Round

Piston Quantity

8

Prop 65

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

Wrist Pin Outer Diameter

0.927

Good.

ORDER# 25690<br><br>Fast shipping, great product!!! Will return for my auto needs. Thanks!!!

Easy to use website, great communication, and product was exactly as described.

They did not have the part I ordered, but they quickly provided me with a nearly equivilent part! The shipping was fast and it was packed perfectly. I like them peoples!!!

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