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JE Pistons 181956 Forged Flat Top Piston Set Bore - 4.165 8-Pack

(1970-1980 Chevrolet 400 Small Block)

Manufacturer

Picture for manufacturer JE Pistons

Part Number

181956
8 reviews
Sale Price

$1,096.99

Estimated ship date Sunday, November 08

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Product Details

The JE Pistons 181956 is a premium forged piston set engineered for high-performance racing applications. Constructed from 2618 aluminum alloy, these pistons deliver exceptional strength and durability under extreme cylinder pressures and temperatures. The flat top design with 18-degree valve reliefs provides optimal combustion chamber geometry for naturally aspirated and forced induction builds.

Key Specifications:

  • Bore Size: 4.165 inches
  • Compression Distance: 1.000 inch
  • Wrist Pin Diameter: 0.927 inch
  • Material: 2618 forged aluminum alloy
  • Crown Design: 18-degree flat top with valve reliefs
  • Recommended Ring Set: J10008-4165-5

Performance Features:

  • Application-specific forgings engineered for optimized, uniform crown thickness to reduce weight while maintaining strength
  • Contact reduction groove minimizes frictional drag for increased horsepower
  • Accumulator groove enhances top ring stability and sealing for improved cylinder pressure retention
  • CNC-machined side relief with lower support band provides additional skirt strength and reduced piston rock
  • Oil rail support included for enhanced ring seal and oil control
  • Precision-honed pin bores for optimal wrist pin fit
  • Double pressure-fed pin oilers ensure proper pin lubrication
  • Wire locks included for secure pin retention

Each set includes 8 matched pistons carefully weight-matched and sized for balanced operation. JE Pistons has been the trusted choice of professional engine builders and racers for over 60 years, delivering race-proven performance for Chevrolet, Ford, Mopar, and Buick engines.

Products specifications

Fits

1970-1980 Chevrolet 400 Small Block

Block Height

9

Bore

4.165

Bore (in)

4.165 in.

Bore (mm)

105.791mm

CID

436

Comp Height

1

Comp Ratio @ 58CC

14.2:1

Comp Ratio @ 64cc

13.7:1

Comp Ratio @ 76CC

13.1:1

Compression Distance (in)

1.000 in.

Dome Volume

-6

Gram Weight

441

Notes

Specify left or right hand piston. Oil rail support included.

Oversize

0.035

Pin Diameter (in)

0.927 in.

Piston Head Volume (cc)

+6.00cc

Piston Material

Forged aluminum

Piston Ring Thickness

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

Piston Style

Flat top, with two valve reliefs

Quantity

Sold individually.

Rod

6

Stroke

4

Wrist Pin Style

Press-fit or floating

Piston Avg Wt

442

Piston Head Type

Flat

Compression Height

1.000

Second Compression Ring Thickness

0.064

Piston Pin Length

2.950

Out of Stock Message

Call for Availability

Add-On

927-2950-15-51S

Oil Ring Thickness

0.218

Industry

Automotive

Cylinder Head

CHEVROLET 18 DEG

Piston Pin Wall Thickness

0.150

Category Hierarchy

Pistons>Piston Kits

Piston Volume

-5.9

Piston Pin Material

5115

Piston Pin Outside Diameter

0.927

Top Compression Ring Thickness

0.064

Make

Chevrolet

Ringset Included

No

Add-On

J10008-4165-5

Engine

SMALL BLOCK CHEVROLET

Bore Diameter

4.165

Piston Material

2618

Product Market

Domestic

Forging Type

Round

Add-On

927-073-AS

Prop 65

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

Piston Quantity

8

Wrist Pin Outer Diameter

0.927

Great prices and fast easy process

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.

thank guys didn't expect the shipment that quit,but any way thak a lot or the next order

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

Very fast shipping and price is rite

I am impressed with they mail order service. Recommended.

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