Mahle Piston Set Hemi 6.4L 392ci 4.090in Bore 3.724in Stroke 6.20in Rod 11.0CR Set of 8

Mahle Piston Set

Fits Most Models with HEMI 6.4L Engine

930279090

Overview:

The Mahle Piston Set is a high-quality forged replacement assembly designed specifically for the HEMI 6.4L (392 cubic inch) engine. Engineered as a direct drop-in solution, this piston set requires no balancing or compression ratio changes, making it an ideal upgrade for enthusiasts and professionals seeking reliable performance and durability. Whether rebuilding or upgrading your Mopar HEMI, these pistons offer precision fitment and consistent performance without the need for additional modifications.

Crafted to meet the demanding standards of modern performance engines, this piston set ensures optimal combustion efficiency and longevity. It is perfectly suited for those looking to maintain factory specifications while benefiting from the strength and reliability of forged components.

Key Features:

Mahle’s piston set incorporates advanced design and manufacturing techniques to deliver superior performance and durability. Key features include:

• Forged construction for enhanced strength and resistance to high-stress conditions
• Drop-in replacement design requiring no balancing or compression ratio adjustments
• Compatible with 6.4L HEMI engines featuring 392 cubic inch displacement
• Precise dimensions: 4.090" bore diameter, 1.211" compression height, 3.724" stroke, 6.200" rod length
• Lightweight design at approximately 453 grams per piston to reduce reciprocating mass
• 11.0:1 compression ratio optimized for performance and reliability
• Utilizes 4032 alloy for excellent thermal conductivity and wear resistance
• 3.6cc piston dish volume to maintain factory combustion chamber characteristics
• 0.945" wrist pin diameter for robust pin connection and durability

Construction & Design:

Mahle’s pistons are manufactured from premium 4032 forged aluminum alloy, known for its excellent strength-to-weight ratio and thermal properties. The forging process enhances grain structure, providing superior fatigue resistance and durability under extreme operating conditions. The pistons are precision-machined to exact tolerances, ensuring a perfect fit within the cylinder bore and consistent performance across all cylinders.

The design maintains the factory compression ratio of 11.0:1, preserving engine characteristics and compatibility with stock components. The piston dish volume of 3.6cc is engineered to optimize combustion chamber shape and efficiency, contributing to smooth power delivery and reliable operation.

Installation & Fitment:

This Mahle piston set is engineered as a direct drop-in replacement for the Mopar HEMI 6.4L 392cid engine, simplifying the installation process. No additional balancing or compression ratio changes are necessary, allowing for a straightforward swap during engine rebuilds or upgrades. The pistons fit standard connecting rods with a 6.200" length and utilize a 0.945" wrist pin diameter, matching OEM specifications.

Professional installation is recommended to ensure proper ring end gap, piston orientation, and torque specifications are met for optimal engine performance and longevity.

What’s Included

• Set of forged pistons (quantity as required for engine rebuild)
• Wrist pins compatible with 0.945" diameter
• Compression rings and oil control rings (if applicable, verify with seller)

Ideal For:

This piston set is ideal for Mopar enthusiasts, engine builders, and performance tuners seeking a reliable, high-strength replacement for the 6.4L HEMI 392cid engine. It suits applications ranging from street performance to mild track use where maintaining factory compression and engine balance is critical. The pistons provide a durable upgrade for those rebuilding or refreshing their HEMI powerplant without altering engine characteristics.