Mahle OE Piston Set

Fits Most Dodge/Jeep 5.2L/4.0L (92-00)

2242007030

Overview:

The Mahle OE 3.9L .030 Piston Set is a premium replacement piston kit engineered to meet or exceed original equipment standards. Designed specifically for select Jeep Grand Cherokee, Dodge Ram, Dakota, and Durango models, this set of eight pistons is ideal for engine rebuilds requiring a precise .030 inch overbore. Mahle’s OE quality ensures reliable performance, durability, and longevity, making it a trusted choice for professional engine builders and enthusiasts alike.

Each piston is crafted to maintain optimal ring sealing and oil control, helping to reduce engine noise, wear, and emissions. This piston set is perfect for restoring engine compression and efficiency after cylinder honing or boring, ensuring your 3.9L engine runs smoothly and efficiently.

Key Features:

Mahle OE pistons incorporate advanced engineering and OE design principles to deliver dependable performance and ease of installation. Key features include:

• Compensated ring grooves for proper ring loading and enhanced oil control
• Expansion-controlled design to accommodate small fitting clearances, reducing engine noise and wear
• Precision manufacturing to OE specifications for consistent fit and function
• Pre-mounted piston rings included for quick and convenient installation
• Includes piston pins and clips for a complete assembly
• Durable construction to withstand high combustion pressures and temperatures
• Designed to improve oil control and reduce emissions
• Manufactured by one of the world’s largest OE piston producers

Construction & Design:

Mahle OE pistons are manufactured from high-quality aluminum alloy, providing an excellent balance of strength, lightweight properties, and thermal conductivity. The pistons feature compensated ring grooves engineered to maintain optimal ring tension and oil control under varying operating conditions. This design helps minimize oil consumption and reduces the risk of piston ring flutter or failure.

The expansion-controlled design allows for tight piston-to-cylinder wall clearances, which reduces engine noise and wear while improving overall engine efficiency. Each piston is precision-machined to exacting tolerances, ensuring a perfect fit in the cylinder bore and compatibility with factory components.

Installation & Fitment:

This piston set is designed for direct replacement in 3.9L engines that have been bored to .030 inch oversize. Installation is straightforward for experienced engine builders and mechanics, with all necessary components included for assembly. No additional modifications are typically required when installed in compatible Jeep Grand Cherokee, Dodge Ram 1500, Ram 2500, Dakota, and Durango models within the specified year ranges.

Proper honing and cleaning of the cylinder bores before installation are recommended to ensure optimal piston sealing and longevity. Using the included piston pins and clips, the pistons can be installed quickly and securely, reducing rebuild time.

What's Included:

• Set of 8 Mahle OE pistons, .030 inch oversize
• Pre-mounted piston rings on each piston
• Piston pins
• Piston pin retaining clips

Ideal For:

This piston set is ideal for professional engine rebuilders, automotive enthusiasts, and mechanics restoring or rebuilding 3.9L engines in Jeep Grand Cherokee, Dodge Ram, Dakota, and Durango vehicles. It is especially suited for engines requiring a .030 inch overbore due to wear or damage, providing a reliable and OE-quality solution to restore engine performance and durability.

MAHLE Aftermarket supplies a broad range of OE-quality engine and service components—engine parts, filters, gaskets, and thermal management—supporting everything from stock maintenance to performance-minded rebuilds. It’s a trusted source when builders want reputable engineering and consistent quality for refreshes, reliability upgrades, and daily-driven performance projects.