JE Pistons BBC .475 DOME Set of 8 Pistons - 258218

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.

Features & Benefits

• 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
• 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
• Skirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise
• Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power
• Made 100% in the USA

Specifications: Piston Set, 2618, Dome, 4.530 Bore, 1.120 CD, 0.990 Pin, Set of 8.

JE designs are specifically engineered for extreme upplications up to, and including, professional competition

Detailed Specifications

• Intake Depth: .300 in.
• 2nd Groove Width: 0.064 in.
• Second Compression Ring Thickness: 0.0640 in.
• Top Compression Ring Thickness: 0.0640 in.
• Top Groove Width: 0.06400 in.
• Wrist Pin Wall Thickness: 0.150 in.
• Oil Ring Thickness: 0.218 in.
• Oil Groove Width: 0.21800 in.
• Exhaust Angle: 16
• Exhaust Diameter: 2.100
• Intake Diameter: 2.400 in.
• Wrist Pin Length: 2.930 in.
• Intake Angle: 25
• Engine Stroke: 4.250 in.
• Piston Volume: 40.00 cc
• Oil Rail Support Required. Part Number:: 4530-203
• Wrist Pin Material: 5115 Low Carbon Steel, Case Hardened
• Piston Average Weight: 595 g
• Connecting Rod Length: 6.535 in.
• Piston Quantity: 8
• Engine: Big Block
• Engine Family: Big Block
• Cylinder Head: OPEN CHAMBER
• Engine Detail: OPEN CHAMBER
• Forging Type: Round
• Accumulator Groove: Yes
• Double Pin Oilers: Yes
• Oil Rail Support Required Part Number: Yes
• Pin Fit: Yes
• Smooth Crown Finish: Yes