JE Pistons Chevrolet LT4 Gen V 4.070 Bore 0.945 Pin -1.320 CD Inv Dome/Dish Pistons - Set of 8 - 353909

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, Inv Dome/Dish, 4.070 Bore, 1.320 CD, 0.945 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: -6.50 cc
• Exhaust Depth: .160
• Intake Depth: .213 in.
• Oversized Amount: 0.005
• 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: 0.119 in.
• Oil Groove Width: 0.11900 in.
• Wrist Pin Wall Thickness: 0.180 in.
• Ring Set Thickness: 1.20 MM x 1.50 MM x 3.00 MM
• Intake Diameter: 1.300 in.
• Compression Ratio: 10.00:1 / 65.50 CC Head
• Exhaust Angle: 11.5
• Exhaust Diameter: 2.200
• Wrist Pin Length: 2.250 in.
• Engine Stroke: 3.622 in.
• OEM Bore Diameter: 4.065
• Connecting Rod Length: 6.098 in.
• Piston Quantity: 8
• Intake Angle: 8.3
• Deck Height: 9.240 in.
• Wrist Pin Retainer Part Number: 927-073-MW
• Wrist Pin Part Number: 945-2250-18-52C
• Forging Type: FSR
• Cylinder Head: GEN 5 LT4
• Ring Set - Recommended: JG31F8-4070-0
• Engine Family: LS
• Engine: LT4 (Gen V)
• Piston Sub-Series: LT4 (Gen V)
• Accumulator Groove: Yes
• Double Pin Oilers: Yes
• Oversized: Yes
• Pin Fit: Yes
• Skirt Coat: Yes
• Wrist Pin Included: Yes
• Wrist Pin Retainer Included: Yes