JE Pistons BBC BLWN ALKY DOME Set of 8 Pistons - 296988

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, 4.500 Bore, 1.270 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: .310 in.
• 2nd Groove Width: 0.064 in.
• Second Compression Ring Thickness: 0.0640 in.
• Top Compression Ring Thickness: 0.0750 in.
• Top Groove Width: 0.07500 in.
• Wrist Pin Wall Thickness: 0.200 in.
• Oil Ring Thickness: 0.218 in.
• Oil Groove Width: 0.21800 in.
• Compression Ratio: 11:1
• Exhaust Angle: 15
• Exhaust Diameter: 2.050
• Intake Diameter: 2.500 in.
• Wrist Pin Length: 2.930 in.
• Piston Volume: 23.50 cc
• Piston Quantity: 8
• Engine: Big Block
• Engine Family: Big Block
• Cylinder Head: OPEN CHAMBER
• Piston Average Weight: 663 g
• Connecting Rod Length: 6.385 in.
• Oil Rail Support Required. Part Number:: 4500-203
• Engine Stroke: 4.250 in.
• Intake Angle: 24
• Engine Detail: OPEN CHAMBER
• Forging Type: Round
• Oil Rail Support Required Part Number: Yes
• Pin Fit: Yes
• Smooth Crown Finish: Yes