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Engines and Components› Pistons and Piston Rings

Mahle Motorsports

6.1L & 6.4L Hemi Forged Piston Set, 4.055in Bore

$788.67 $742.27 Save $46.40

SKU: HMI220055F01

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Overview

The Mahle Hemi 6.1L & 6.4L Cylinder Head 370 c.i. These pistons feature a 4.055-inch bore, 3.58-inch stroke, and a -1cc volume with a 10.0:1 compression ratio. They are constructed from 4032 aluminum alloy for durability and performance.

The kit is compatible with various Dodge and Jeep models, including the Challenger, Charger, Magnum, and Grand Cherokee, across specific year ranges. This product is not an emissions item.
Show original supplier description
The Mahle Hemi 6.1L & 6.4L Cylinder Head Piston Kit, MPN HMI220055F01, is engineered for performance enthusiasts and engine builders working with Hemi 6.1L and 6.4L engines, offering a 370 cubic inch displacement. Mahle, with its core competence in piston and piston system development, provides integrated system solutions with high-end engineering. These pistons are forged from 4032 low expansion aluminum alloy for high strength and reliability. Key specifications include a 4.055-inch bore, 3.58-inch stroke, 6.240-inch rod length, 1.220-inch compression height, 0.984-inch pin diameter, -1cc valve volume, and a 10.0:1 compression ratio. The pistons also feature an anti-friction skirt coating for reduced drag. This piston kit is designed for specific vehicle applications, including 2009-2010 Dodge Challengers, various Dodge Chargers from 2006-2010, 2006-2008 Dodge Magnums, and 2006-2010 Jeep Grand Cherokees. It's important to verify fitment manually as the product listing notes a lack of comprehensive fitment data. Mahle's pistons are machined with attention to detail in ring groove quality, tolerances, and consistency, making them suitable for applications ranging from economical small cars to heavy-duty commercial vehicles, and specifically noted for performance use in drag racing and other motorsports.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandMahle Motorsports
Part NumberHMI220055F01
CategoryEngines and Components
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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