JE Pistons RENAULT WILLIAMS F7R 12.5:1 Set of 4 Pistons - 312457

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 European, import and sport compact 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 drift 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
• Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
• Made 100% in the USA

Specifications: Piston Set, 2618, Dome, 3.256 Bore, 1.208 CD, 0.827 Pin, Set of 4.

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

Detailed Specifications

• Exhaust Depth: .156
• Intake Depth: .215 in.
• Top Compression Ring Thickness: 0.0400 in.
• Top Groove Width: 0.04000 in.
• 2nd Groove Width: 0.048 in.
• Second Compression Ring Thickness: 0.0480 in.
• Oil Ring Thickness: 0.111 in.
• Oil Groove Width: 0.11100 in.
• Wrist Pin Wall Thickness: 0.150 in.
• Exhaust Diameter: 1.500
• Intake Diameter: 1.600 in.
• Wrist Pin Length: 2.250 in.
• Exhaust Angle: 25
• Intake Angle: 25
• Engine Stroke: 3.661 in.
• Piston Average Weight: 313 g
• Piston Quantity: 4
• Piston Volume: 4.50 cc
• Connecting Rod Length: 5.669 in.
• Wrist Pin Material: 5115 Low Carbon Steel, Case Hardened
• Bore Diameter: 82.70 mm
• Cylinder Head: F7R
• Engine: F7R
• Forging Type: FSR
• Ring Set - Recommended: JG1001-3268
• Accumulator Groove: Yes
• Pin Fit: Yes
• Ring Set Included: Yes
• Skirt Coat: Yes