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JE Pistons 173618 Forged Flat Top Piston Set Bore Alloy - 4.040 2618 8-Cylinder

Manufacturer

Picture for manufacturer JE Pistons

Part Number

173618
12 reviews
Sale Price

$1,176.99

Estimated ship date Sunday, November 15

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Product Details

JE Pistons 173618 is a high-performance forged piston set engineered from 2618 aluminum alloy for extreme durability in racing and high-output applications. This 8-piston set features a flat top design with a 4.040-inch bore diameter, 1.550-inch compression distance, and 0.927-inch pin bore, making it compatible with 3.480-inch and 3.500-inch stroke crankshafts.

Advanced Performance Features:

  • Application-Specific Forgings: Optimized crown thickness provides uniform strength and heat distribution
  • 23-Degree Inverted Dome Design: Ultra-light gas ported configuration reduces weight while maintaining structural integrity
  • Contact Reduction Groove: Minimizes frictional drag for improved power output and efficiency
  • Accumulator Groove: Enhances top ring stability and sealing for better compression retention
  • CNC-Machined Side Relief: Features lower support band for additional skirt strength and reduced friction
  • Complete Pin Assembly: Includes honed pin bores, double pressure-fed pin oilers, and wire locks

JE Pistons has been the industry leader in forged racing pistons for over 60 years, delivering proven performance for Chevrolet, Ford, Mopar, and Buick engines. These pistons are sold as precision-matched sets to ensure balanced rotating assembly. Recommended Ring Set: J70008-4040-5 (sold separately).

Products specifications

Block Height

9

Bore (in)

4.040 in.

Bore (mm)

102.616mm

CID

359

Comp Ratio @ 58CC

11.6:1

Comp Ratio @ 64cc

10.8:1

Comp Ratio @ 76CC

9.4:1

Compression Distance (in)

1.550 in.

Dome Volume

-1.8

Gram Weight

401

Oversize

0.035

Pin Diameter (in)

0.927 in.

Piston Head Volume (cc)

+1.80cc

Piston Material

Forged aluminum

Piston Ring Thickness

0.043 in. x 0.043 in. x 3.0mm

Piston Style

Flat top, with two valve reliefs

Quantity

Sold individually.

Rod

5.7

Stroke

3.5

Wrist Pin Style

Press-fit or floating

Piston Pin Material

5115

Category Hierarchy

Pistons>Piston Kits

Second Compression Ring Thickness

0.044

Piston Head Type

Flat

Oil Ring Thickness

0.119

Industry

Automotive

Piston Pin Wall Thickness

0.130

Forging Type

Round

Make

Chevrolet

Piston Pin Length

2.400

Bore Diameter

4.040

Piston Avg Wt

405

Out of Stock Message

Call for Availability

Engine

SMALL BLOCK CHEVROLET

Cylinder Head

STD CHEVROLET 23 DEG

Ringset Included

No

Add-On

927-073-MW

Piston Volume

-1.5

Add-On

927-2400-13-51C

Piston Pin Outside Diameter

0.927

Product Market

Domestic

Add-On

J71408-4040-5

Top Compression Ring Thickness

0.0436

Compression Height

1.550

Piston Material

2618

Prop 65

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

Wrist Pin Outer Diameter

0.927

Nice low price keep up the good work

Quick and easy

Simple

got a quality OEM part! And got it very fast! Nicely done!

...

first time so far so good

Quick and easy, thanks

Cheapest priced ARP head studs on the internet. A++ I will definitely do more business with Autoplicity.

So far, so good.

Processed and shipped fast. I was a little upset with them shipping my Eibach springs in the Eibach box, and not repackaging it. Everyone could see the box, and knew what was in it. But this will not stop me from ordering again.

Found what I needed at an unbeatable price, easy purchase! No issues

The correct product that I ordered, and easy to find through there web site.thanks

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