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JE Pistons 213121 Piston Set, 2618, Dome, 4.145 Bore, 1.125 Cd, 0.927 Pin, Set Of 8.

(1970-1980 Chevrolet 400 Small Block)

Part of: JE Pistons Piston Set Dome Bore Cd Pin Set Of

Other options in this family: JE Pistons 166035 JE Pistons 182015 JE Pistons 207513 JE Pistons 182042 JE Pistons 182037

Manufacturer

Picture for manufacturer JE Pistons

Part Number

213121
4 reviews
Sale Price

$1,154.99

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Product Details

The JE Pistons 213121 is a forged 2618 alloy dome piston set designed for high-compression, high-horsepower Small Block Chevy applications running 17°/18° cylinder heads. With a 4.145-inch bore, 0.927-inch wrist pin, and a 1.125-inch compression distance, these pistons deliver the precision and durability demanded by serious racing engine builders.

Key Features:

  • 18-Degree Solid Dome Design — Smooth-flowing dome profile optimized for flame travel and compatibility with angle-milled heads; newer dome profile fits a wider variety of 18° heads
  • +2.5cc Dome Volume — Engineered for high-compression, high-output race engine builds
  • 2618 Forged Alloy Construction — Premium low-silicon alloy for maximum strength under extreme heat and load conditions
  • Application-Specific Forgings — Optimized, uniform crown thickness tailored for the specific engine application
  • Contact Reduction Groove — Minimizes frictional drag for improved efficiency and ring life
  • Accumulator Groove — Increases top ring stability and sealing for consistent compression
  • CNC-Machined Side Relief with Lower Support Band — Provides additional skirt strength and precise fitment
  • Honed Pin Bores — Double pressure-fed pin oilers and wire locks included
  • Dedicated Left/Right-Hand Forgings — Accepts 1/16 x 1/16 x 3/16-inch ring grooves
  • New Valve Reliefs — Accommodates larger valves and long-duration, tight lobe separation camshafts
  • Oil Rail Support Included — Complete kit ready for installation
  • 469-Gram Piston Weight — Balanced set for smooth, high-RPM operation

Set Includes: 8 matched forged pistons | Recommended Ring Set: J10008-4145-5

Note: Will not fit Brodix 18X cylinder heads.

JE Pistons are engineered, forged, and machined 100% in the USA. Trusted by top engine builders in NASCAR, NHRA, IHRA, and dirt late model racing, JE Pistons are sold as matched sets to ensure consistent performance across all cylinders.

Products specifications

Fits

1970-1980 Chevrolet 400 Small Block

Block Height

9

Bore

4.145

Bore (in)

4.145 in.

Bore (mm)

105.283mm

CID

405

Comp Height

1.125

Comp Ratio @ 58CC

15.1:1

Comp Ratio @ 64cc

14.4:1

Comp Ratio @ 76CC

13.8:1

Compression Distance (in)

1.125 in.

Dome Volume

2.5

Gram Weight

469

Notes

Specify left or right hand piston. Oil rail support included. Solid dome design.

Oversize

0.015

Pin Diameter (in)

0.927 in.

Piston Head Volume (cc)

-2.50cc

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

Stroke

3.75

Wrist Pin Style

Press-fit or floating

Piston Material

2618

Piston Pin Outside Diameter

0.927

Ringset Included

No

Industry

Automotive

Piston Pin Wall Thickness

0.150

Piston Pin Material

5115

Top Compression Ring Thickness

0.064

Make

Chevrolet

Piston Avg Wt

469

Compression Height

1.125

Product Market

Domestic

Forging Type

Round

Bore Diameter

4.145

Add-On

927-073-AS

Add-On

J10008-4145-5

Add-On

927-2750-15-51S

Cylinder Head

CHEVROLET 18 DEG

Piston Volume

3.3

Piston Pin Length

2.750

Piston Head Type

Dome

Engine

SMALL BLOCK CHEVROLET

Out of Stock Message

Call for Availability

Oil Ring Thickness

0.218

Second Compression Ring Thickness

0.064

Category Hierarchy

Pistons>Piston Kits

Wrist Pin Outer Diameter

0.927

Piston Quantity

8

Prop 65

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

They had the lowest price by far! Quick shipment! I am going back for more. Thanks!<br><br>Order 6489

Great

Finally I found the part I have searched all over for. Thank you autoplicity for having such a specialized part. Great customer service too. Very easy to use web site as well.

I purchased a wiring connector and some additional wiring pins. Super fast shipping. Likely to buy from again.

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