Wiseco Professional Series Forged Piston Set

2011–2024 Chrysler 300, Dodge Challenger, Dodge Charger, Dodge Durango, Jeep Grand Cherokee SRT8, Jeep Wrangler, Ram 2500, Ram 3500, Jeep Grand Wagoneer 6.4L 392 HEMI

Part #: K0397X1

Overview

The Wiseco Professional Series Forged Piston Set is engineered specifically for the Chrysler Gen 3 6.4L HEMI V8 engine, covering model years 2011 through 2024. Designed for high-performance and racing applications, these pistons offer exceptional strength and durability to handle the extreme demands of heavy-duty and severe duty race builds. Whether you are building a high-output street engine or a track-focused race machine, this piston set delivers reliable performance and longevity beyond factory specifications.

Each set includes eight forged pistons with a 4.100-inch bore diameter and a 1.210-inch compression height, optimized for the 6.4L HEMI platform. The pistons come complete with premium piston rings to ensure superior sealing, combustion efficiency, and power delivery.

Key Features

Wiseco’s Professional Series pistons incorporate advanced engineering and manufacturing techniques to meet the rigorous demands of motorsports and high-performance builds. Key features include:

• Forged from high-strength aluminum alloy for superior durability and resistance to thermal and mechanical stress
• Precision CNC machining to exact tolerances for consistent bore fit and optimal piston-to-cylinder wall clearance
• 1.210-inch compression height tailored for the Chrysler 6.4L HEMI to maintain proper deck and piston-to-valve clearance
• 0.927-inch wrist pin diameter for enhanced pin strength and reduced deflection under high loads
• Supplied with premium piston rings designed for improved sealing, reduced blow-by, and enhanced oil control
• Optimized piston crown design to support efficient combustion and high compression ratios typical of performance HEMI engines
• Engineered for heavy-duty race builds including drag racing, road racing, and other motorsport applications requiring maximum reliability
• Compatible with factory and aftermarket components designed for the Chrysler Gen 3 6.4L HEMI platform

Construction & Design

These pistons are forged from a premium aluminum alloy selected for its excellent strength-to-weight ratio and thermal conductivity. The forging process enhances the grain structure, providing superior fatigue resistance compared to traditional cast pistons. CNC machining ensures each piston meets strict dimensional specifications critical for maintaining engine reliability and performance at high RPMs.

The piston design features a robust pin boss and a 0.927-inch wrist pin diameter to withstand the increased loads encountered in racing environments. The 1.210-inch compression height is precisely matched to the 6.4L HEMI’s cylinder geometry, ensuring optimal piston positioning within the combustion chamber for maximum power and efficiency.

Installation & Fitment

This piston set is a direct replacement for the Chrysler Gen 3 6.4L HEMI engine with a 4.100-inch bore. Installation requires standard engine assembly procedures, including proper honing and cleaning of the cylinder bores. The pistons are compatible with factory connecting rods and wrist pins sized for the 0.927-inch pin diameter.

No modifications to the engine block or other components are necessary when installing this piston set, provided the engine is prepared to the correct specifications. Professional engine assembly and balancing are recommended to maximize performance and longevity.

What's Included

• Set of 8 forged pistons with 4.100-inch bore diameter
• Premium piston rings (pre-installed or included)
• All pistons feature 1.210-inch compression height and 0.927-inch wrist pin diameter

Ideal For

• Performance enthusiasts building high-output Chrysler 6.4L HEMI engines
• Racers requiring durable pistons for drag racing, road racing, and other motorsports
• Engine builders focused on heavy-duty, severe duty race applications
• Anyone upgrading from stock pistons to forged components for improved strength and reliability