What is the purpose of the moly skirt coating on these pistons?

The moly skirt coating on these Manley pistons helps to reduce friction between the piston skirt and the cylinder wall. This can lead to improved durability and potentially a slight increase in performance due to less drag.

What is the significance of the -12.5cc dish volume?

The -12.5cc dish volume is a feature that helps to lower the compression ratio of your engine. This is beneficial for builds using forced induction (like turbochargers or superchargers) or for naturally aspirated engines where you want to use a more aggressive camshaft without excessive static compression.

Are these pistons suitable for a daily driver?

These pistons are not CARB approved and cannot be shipped to California, indicating they are intended for performance or racing applications. While they are well-built, their design and materials are optimized for high-stress environments, and they may not be the ideal choice for a standard daily driver.

Specifications

Brand: Manley Performance
Part #: 598900C-8
UPC: 807298094700

Manley Chrysler HEMI 6.4L 4.090in Bore 1.210in CD -12.5cc Dish Coated Pistons - Set of 8

Name: Manley Chrysler HEMI 6.4L 4.090in Bore 1.210in CD -12.5cc Dish Coated Pistons - Set of 8
Brand: Manley Performance
SKU: manley-performance-manley-chrysler-hemi-6-4l-4-090in-bore-1-210in-cd-12-5cc-dish-t14-190061
Price: 1004.51 USD
Availability: BackOrder

$1004.51

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley 6.4L HEMI 4.090in bore forged pistons. Set of 8 with moly skirt coating for improved durability and performance.

Key Features

Fits Chrysler HEMI 6.4L engines with a 4.090 inch bore.
Set includes 8 forged pistons with a -12.5cc dish volume.
Constructed from strong domestic 2618 alloy forgings.
Features a moly skirt coating for improved durability and reduced friction.
Includes tool steel wrist pins for added strength.
Piston ring lands and grooves are machined to strict standards for enhanced ring seal.

These pistons are designed for Chrysler HEMI 6.4L engines. Please verify compatibility with your specific engine build.

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About this part

Product Details

If you're building a high-performance Chrysler HEMI 6.4L engine, these Manley Performance pistons are a solid choice. They are designed for a 4.090-inch bore and feature a -12.5cc dish, which is common for naturally aspirated or forced induction builds where you want to control compression ratio. This set includes eight pistons, along with tool steel wrist pins and a moly skirt coating to help them slide smoothly in the cylinder walls.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to handle high cylinder pressures. The pistons have proven cam and barrel skirt profiles that help them work with the cylinder walls rather than against them, reducing wear and noise. They also pay close attention to the ring lands and grooves, ensuring a tight seal with your piston rings for better compression and more power. Machining these critical areas in a single operation helps ensure the ring grooves are perfectly square to the piston skirt, which is important for proper ring function.

This set comes with premium chrome moly wrist pins, and Manley offers upgrades to even stronger alloys if your build demands it. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. They are intended for off-road or racing applications where maximum performance is the goal.