JE Pistons LS ASYM FT Set of 8 Pistons - 311963

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, Flat Top, 4.010 Bore, 1.304 CD, 0.927 Pin, Set of 8.

These pistons utilize our dedicated Forged Side Relief (FSR) forging that was specifically designed to increase strength.

Detailed Specifications

• Piston Volume: -5.00 cc
• Intake Depth: .235 in.
• Oversized Amount: 0.010
• Top Compression Ring Thickness: 0.0480 in.
• Top Groove Width: 0.04800 in.
• 2nd Groove Width: 0.06 in.
• Second Compression Ring Thickness: 0.0600 in.
• Oil Ring Thickness: 0.1175 in.
• Oil Groove Width: 0.11750 in.
• Wrist Pin Wall Thickness: 0.150 in.
• Ring Set Thickness: 1.20 MM x 1.50 MM x 3.00 MM
• Compression Ratio: 10.60:1 / 64.00 CC Head
• Exhaust Angle: 12
• Intake Angle: 12
• Exhaust Diameter: 2.000
• Wrist Pin Length: 2.250 in.
• Intake Diameter: 2.450 in.
• Engine Stroke: 3.622 in.
• OEM Bore Diameter: 4.000
• Piston Average Weight: 418 g
• Wrist Pin Material: 5115 Low Carbon Steel, Case Hardened
• Connecting Rod Length: 6.125 in.
• Piston Quantity: 8
• Deck Height: 9.240 in.
• Wrist Pin Retainer Part Number: 927-073-MW
• Wrist Pin Part Number: 927-2250-15-51C
• Forging Type: FSR
• Pro Seal Head Gasket: GM1016-051
• Ring Set - Recommended: JG3108-4010-4
• Engine Family: LS
• Cylinder Head: LS 12 DEG/15 DEG COMBO VR
• Piston Sub-Series: LS Flat Top
• Engine: LS2
• Accumulator Groove: Yes
• Double Pin Oilers: Yes
• Oversized: Yes
• Pin Fit: Yes
• Skirt Coat: Yes
• Wrist Pin Included: Yes
• Wrist Pin Retainer Included: Yes