JE Pistons 314557 Piston Set, 2618, Inv Dome/dish, 3.552 Bore, 1.220 Cd, 0.866 Pin, Set Of 8.

The JE Pistons 314557 is a complete eight-piece forged piston set engineered for the Ford 4.6L 2-valve Modular V8. Built from 2618 forged aluminum alloy, these pistons deliver the high tensile strength demanded by performance and high-horsepower engine builds. Each piston features an inverted dome/dish crown design targeting an 8.5:1 compression ratio, making them well-suited for forced induction and nitrous applications.

Key Specifications:

• Bore: 3.552 in.
• Compression Height (CD): 1.220 in.
• Wrist Pin Diameter: 0.866 in.
• Crown Style: Inverted Dome/Dish
• Material: 2618 Forged Aluminum
• Forging Type: FSR (Forged Side Relief)
• Cylinders: 8 (complete set)
• Ring Compatibility: Machined for modern 1.0mm/1.2mm/2.8mm and 1.2mm/1.5mm/3.0mm ring packages

Key Features:

• Proprietary FSR Forging: JE's dedicated Forged Side Relief forging minimizes friction and power loss through a reduced skirt width profile, while also saving weight via a shorter wrist pin design
• Lightweight & Durable: The FSR forging is specifically engineered for high-horsepower engine environments where strength-to-weight ratio is critical
• Skirt Coating: Reduces friction and wear on piston skirts and cylinder walls while lowering operating noise
• Accumulator Groove: Helps reduce pressure from combustion gases, minimizing ring flutter and improving ring seal for consistent power output
• Made in the USA: Engineered, forged, and machined 100% domestically

The JE Pistons Modular Ford FSR line is the result of over 75 years of forged piston expertise, purpose-built for demanding performance applications from street builds to the drag strip. Each piston is designed for a specific engine and application to provide the ideal combination of durability and performance.