Wiseco Professional Series Forged Piston Set

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

Part #: K0398XS

Overview

The Wiseco Professional Series Forged Piston Set is engineered specifically for the Chrysler 6.4L Gen III HEMI engine, delivering exceptional strength and durability for serious racers and high-performance builders. This set of eight forged pistons is designed to withstand the rigors of heavy to severe duty race applications, making it ideal for track-only race engines or high-output street machines. With precision fitment and premium piston rings included, these pistons provide enhanced engine efficiency and reliability under extreme conditions.

Whether you are upgrading a Dodge Challenger, Jeep Grand Cherokee, Ram 2500, or any compatible 6.4L 392 HEMI-powered vehicle, Wiseco’s Professional Series pistons offer a complete solution to push your build beyond factory limits with confidence.

Key Features

Wiseco’s Professional Series pistons incorporate advanced materials and design elements to deliver superior performance and durability:

• Forged from high-strength aluminum alloy for maximum toughness and heat resistance
• Precision CNC-machined 4.090-inch bore diameter for optimal cylinder sealing and fitment
• Compression height of 1.125 inches engineered for proper deck and piston-to-valve clearance in Gen III HEMI engines
• 0.927-inch wrist pin diameter designed to reduce piston pin deflection and enhance strength
• Negative 16.5cc piston dish volume to optimize compression ratio and combustion chamber shape
• Complete set of eight pistons tailored for V8 engine builds
• Includes premium piston rings matched to piston design for improved sealing and reduced blow-by
• Specifically designed for Chrysler Gen III HEMI 6.4L engines ensuring perfect compatibility

Construction & Design

These pistons are crafted using Wiseco’s advanced forging process, which refines the metal grain structure to significantly improve strength and fatigue resistance. The forged aluminum alloy construction offers excellent thermal conductivity, efficiently managing combustion heat during high-RPM operation. This ensures durability and consistent performance even under the most demanding racing conditions.

The pistons feature a carefully engineered dish volume of -16.5cc, optimizing compression and combustion efficiency for race-tuned Gen III HEMI engines. Reinforced wrist pin and ring lands provide added durability to withstand severe duty racing environments, ensuring long-lasting reliability.

Installation & Fitment

This piston set is designed as a direct replacement for Chrysler 6.4L Gen III HEMI engines, fitting the factory cylinder bore size of 4.090 inches with precise compression height specifications. Installation requires no modifications to the engine block or connecting rods, making it a straightforward bolt-in upgrade for professional engine builders and performance enthusiasts alike.

Compatible with a wide range of vehicles including the 2011–2024 Chrysler 300 6.4L 392, Dodge Challenger 6.4L 392, Dodge Charger 6.4L 392, Dodge Durango 6.4L 392, Jeep Grand Cherokee 6.4L SRT8, Jeep Wrangler 6.4L 392, Ram 2500 and 3500 6.4L 392, and the 2022–2024 Jeep Grand Wagoneer 6.4L 392.

What's Included

• Set of 8 forged aluminum pistons
• Premium piston rings matched to the piston design
• Wrist pins and circlips (if applicable per kit contents)

Ideal For

• Professional racers and engine builders requiring high-strength pistons for severe duty applications
• Performance enthusiasts upgrading Chrysler 6.4L Gen III HEMI engines for track or drag racing
• Builders seeking reliable forged pistons with precision fitment and advanced durability features
• Heavy-duty race builds demanding pistons capable of handling increased cylinder pressures and high RPM

Wiseco is a forged piston and engine-components brand trusted in both automotive and powersports performance, offering precision-made pistons and kits for high-RPM, high-boost, and high-load builds. Whether you’re rebuilding for durability or chasing serious horsepower, Wiseco parts are chosen for strength, consistency, and proven performance in demanding conditions.