Wiseco 4057FSX 4.057 in. Forged Piston Street Performance Single

The Wiseco 4057FSX is a forged aluminum performance piston designed for high-performance street and sport compact engine builds. Featuring a 4.057-inch bore diameter, this piston is engineered to deliver superior strength, reduced weight, and improved thermal efficiency compared to OEM cast pistons.

Wiseco forged pistons are manufactured from aerospace-grade 2618 or 4032 aluminum alloy and are CNC-machined to precise tolerances, ensuring optimal ring seal and long-term durability under demanding performance conditions. The FSX designation reflects Wiseco's forged street performance series, built to handle elevated compression ratios and modified engine environments.

Key Features:

• 4.057 in. bore diameter for precision fitment in oversize or rebuilt bore applications
• Forged aluminum construction for superior strength-to-weight ratio over cast alternatives
• CNC-machined to tight tolerances for consistent ring seal and reduced blow-by
• Cam-and-barrel skirt design optimized for proper piston-to-wall clearance
• Valve pockets machined deeper and larger than stock for improved clearance with performance camshafts
• Compatible with Wiseco Spirolox wrist pin retainers for secure pin retention
• Designed for street performance and modified naturally aspirated applications

Each Wiseco piston is sold individually and includes a matching ring set. Professional installation by a qualified engine builder is recommended to ensure proper bore preparation, piston-to-wall clearance, and ring gap sizing per Wiseco's published specifications.