Manley 612205C-4 Forged Pistons for Subaru WRX STI Bore Stroke - EJ257 100mm 79mm

The Manley 612205C-4 forged piston set is engineered specifically for Subaru WRX STI EJ257 engines with a 79mm stroker crankshaft configuration. These high-performance pistons are precision-machined from forged aluminum alloy to withstand the extreme pressures and temperatures of turbocharged and high-boost applications.

Key Specifications:

• 100mm bore diameter for increased displacement
• 17cc dish volume for optimized compression ratio
• Designed for 79mm stroke crankshafts (stroker build)
• Forged construction for maximum strength and durability

Features and Benefits:

• Forged aluminum construction provides superior strength-to-weight ratio compared to cast pistons
• Dish design allows for precise compression ratio tuning in forced induction applications
• Precision-machined ring lands ensure optimal ring seal and oil control
• Compatible with aftermarket connecting rods and crankshafts for stroker builds
• Engineered to handle high horsepower and boost levels in performance and racing applications

This piston set is ideal for enthusiasts building high-performance EJ257 engines for street, track, or competition use. The 100mm bore combined with a 79mm stroke provides increased displacement over stock, resulting in substantial gains in torque and horsepower when properly tuned.