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BBC .675 DOME Set of 8 Pistons

Part Number 258258 (132583549)
$1,076.99
Out of stock

Description

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for domestic applications. Engineered, forged and machined 100% in the USA, JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From dirt track to drag strip, JE Pistons? performance is proven in victory lane time and time again. Equip your engine with the best in forged pistons.

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.

MADE IN USA

Features & benefits

  • Designed specifically for Chevrolet Big Block 427 Engines. To provide optimized performance durability
  • Includes high-quality wrist pins, and locks
  • Made 100% in the USA
  • 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
  • Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power
  • Skirt coating (depending on application) 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 each engine and use application to provide optimized performance durability
  • 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.
  • Smooth Crown Finish: Deburs all areas around the valve pocket and dome area, to reduces stress risers and prevent hot spots.
  • 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 0.064
3D Undercrown Milling No
Accumulator Groove Yes
Add-On J10008-4320-5
Anodize Top Ring Groove No
Bore Diameter 4.320
Combo 2 No
Compression Height 1.395
Compression Ratio 0.54166666666667
Connecting Rod Length 6.385 IN
Contact Reduction No
Country Of Origin USA
Cylinder Head OPEN CHAMBER
Double Pin Oilers Yes
DVGP No
Econo Undercrown Milling No
EN Plating No
Engine Big Block
Engine Detail OPEN CHAMBER
Engine Displacement 454 BB
Engine Family Big Block
Engine Stroke 4.000
Engine Type ICE
Exhaust Angle 16
Exhaust Depth ^.120
Exhaust Diameter 2.100
Forging Type Round
Gas Distribution No
Industry Automotive
Intake Angle 25
Intake Depth .300
Intake Diameter 2.400
Lateral Gas Ports No
Make Chevrolet
Mill Undercrown No
Oil Groove Width 0.18800
Oil Ring Thickness 0.188
Pin Fit Yes
Piston Average Weight 606
Piston Head Type Dome
Piston Material 2618
Piston Quantity 8
Piston Series JE Pistons
Piston To Wall Clearance -0.0045
Piston Volume 47.00
Product Market Domestic
Product Type Engine Piston Kit
Ring Set Included No
Second Compression Ring Thickness 0.0640
Skirt Coat No
Smooth Crown Finish Yes
Thermal Crown No
Top Compression Ring Thickness 0.0640
Top Groove Width 0.06400
Tuff Skirt No
Ultra Dome No
Ultra Groove No
Ultra Groove Plus Gas Port No
Vertical Gas Ports No
Wrist Pin Length 2.930
Wrist Pin Material 5115 Low Carbon Steel, Case Hardened
Wrist Pin Outer Diameter 0.990
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.

Carb Status

California carb status to be completed

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