Wiseco K0398X1 Chrysler 6.4L Gen III Hemi Apache Forged Piston Set 4.100 in. Bore

The Wiseco K0398X1 is a Professional Series forged piston set engineered for the Chrysler 6.4L Gen III Hemi Apache engine.

Wiseco's Professional Series represents their highest level of piston engineering — no-expense-spared components designed for heavy to severe duty race applications. Each piston is forged and precision-machined in the USA from 2618 high-strength aluminum alloy, delivering superior tensile strength over standard cast or hypereutectic alternatives.

Key Features:

• Bore: 4.100 in.
• Compression Height: 1.125 in.
• Pin Diameter: 0.8661 in.
• Set Quantity: 8 pistons
• ArmorGlide® Skirt Coating — seizure resistant, reduces friction, and provides quieter operation
• Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
• Fully machined crown features for precise combustion chamber geometry
• Precision ring grooves with anti-detonation groove and additional ring seal improvements
• Forced pin oiling for enhanced lubrication under high-load conditions
• Includes premium rings

The Wiseco K0398X1 piston set is the choice for builders pushing the 6.4L 392 Hemi platform in high-performance street, strip, or race applications where off-the-shelf components simply won't hold up.