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Piston Set, 2618, Flat Top, 4.155 Bore, 1.165 CD, 0.927 Pin, Set of 8.

Part Number 323989 (155621750)
MADE IN USA
Unavailable

Description

JE Auto forged pistons from JE Pistons are the result of over 75 years of industry leading experience extended to our range of premium forged pistons for LSX 12 and 15 Degree Engines. JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons’ performance is proven in victory lane time and time again. Equipped with the following custom level features

JE pistons are all designed, forged, and machined in-house, allowing control over every step of the piston-making process. JE Pistons 7+ decades of experience in high-level racing has led to offering premium racing features, including full billet construction, EN plating, and purpose-designed coatings, to name a few.

Features & benefits

  • Skirt Coat: Skirt Coat reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise
  • Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
  • Designed specifically for LSX 12 and 15 Degree Engines. To provide optimized performance durability
  • Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
  • Includes high-quality wrist pins, and locks
  • Made 100% in the USA
  • Accumulator Groove: A specialty groove between the top and second ring provides added volume for blow-by gases. This helps reduce pressure between the rings, improving top ring seal and minimizing ring flutter at high cylinder pressures.
  • Double Pin Oilers: Deliver twice the amount of oil to the wrist pin as compared to the standard single pin oiler.
  • Pin Fit: The pin bore is precision honed to attain an exact pin clearance. Clearances typically range from .0003 to .0010 between the wrist pin and pin bore.

Specifications

2nd Groove Width 0.06
3D Undercrown Milling No
Accumulator Groove Yes
Anodize Top Ring Groove No
Bore Diameter 4.155
Combo 2 No
Compression Height 1.165
Compression Ratio 11.70:1 / 64.00 CC Head
Connecting Rod Length 6.125
Contact Reduction No
Country Of Origin USA
Cylinder Head LS 12 DEG/15 DEG COMBO VR
Deck Height 9.240
Double Pin Oilers Yes
DVGP No
Econo Undercrown Milling No
EN Plating No
Engine LSX
Engine Displacement 423
Engine Family LS
Engine Stroke 3.900
Engine Type ICE
Exhaust Angle 12
Exhaust Depth S
Exhaust Diameter 2.000
Forging Type FSR
Gas Distribution No
Intake Angle 12
Intake Depth .235
Intake Diameter 2.450
Lateral Gas Ports No
Make Chevrolet
Mill Undercrown No
OEM Bore Diameter 4.125
Oil Groove Width 0.11750
Oil Ring Thickness 0.1175
Oversized Yes
Oversized Amount 0.030
Pin Fit Yes
Piston Average Weight 415
Piston Head Type Flat
Piston Material 2618
Piston Quantity 8
Piston Series JE Pistons
Piston Sub-Series LS Flat Top
Piston To Wall Clearance -0.004
Piston Volume -5.00
Product Market Domestic
Product Type Engine Piston Kit
Ring Set - Recommended JG31F8-4155-3
Ring Set Included No
Ring Set Thickness 1.20 MM x 1.50 MM x 3.00 MM
Second Compression Ring Thickness 0.0600
Skirt Coat Yes
Smooth Crown Finish No
Thermal Crown No
Top Compression Ring Thickness 0.0480
Top Groove Width 0.04800
Tuff Skirt No
Ultra Dome No
Ultra Groove No
Ultra Groove Plus Gas Port No
Vertical Gas Ports No
Wrist Pin Included Yes
Wrist Pin Length 2.250
Wrist Pin Material 5115 Low Carbon Steel, Case Hardened
Wrist Pin Outer Diameter 0.927
Wrist Pin Part Number 927-2250-15-51C
Wrist Pin Retainer Included Yes
Wrist Pin Retainer Part Number 927-073-MW
Wrist Pin Wall Thickness 0.150

Warranty

30 Months

Magnuson-Moss Warranty Act

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).

California residents

WARNING: This product can expose you to chemicals including nickel, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

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