JE Pistons 311985 Features:

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.

• 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
• Engine Type: ICE
• Oil Ring Thickness: 0.149 in.
• Wrist Pin Included: Yes
• Wrist Pin Part Number: 927-2250-15-51C
• Wrist Pin Material: 5115 Low Carbon Steel, Case Hardened
• Wrist Pin Outer Diameter: 0.927 in.
• Wrist Pin Length: 2.250 in.
• Wrist Pin Wall Thickness: 0.150 in.
• Wrist Pin Retainer Included: Yes
• Wrist Pin Retainer Part Number: 927-073-MW
• Piston Series: JE Pistons
• Cylinder Head: LS 12 DEG/15 DEG COMBO VR
• Bore Diameter: 4.125 in.
• Piston Head Type: Flat
• Compression Height: 1.115 in.
• Piston Volume: -5.00 cc
• Piston Material: 2618
• Piston Quantity: 8
• Forging Type: FSR
• Piston Average Weight: 413 GR
• Ring Set Included: No
• Top Compression Ring Thickness: 0.0480 in.
• Second Compression Ring Thickness: 0.0600 in.
• Engine Displacement: 427 CID
• Engine Stroke: 4.000 in.
• Connecting Rod Length: 6.125 in.
• Deck Height: 9.240 in.
• Ring Set Thickness: 1.20 MM x 1.50 MM x 3.00 MM
• Oversized: No
• Ring Set - Recommended: JG31F8-4125-2
• OEM Bore Diameter: 4.125
• Piston Sub-Series: LS Flat Top
• Pro Seal Head Gasket: GM1005-051
• Engine Family: LS
• Compression Ratio: 12.20:1 / 64.00 CC Head
• Oversized Amount: Standard
• Engine: LS7
• Make: Chevrolet