What does the '+.010 Over Size' designation mean for these pistons?

This means the pistons are manufactured to be 0.010 inches larger in diameter than the standard bore size for your engine. This is typically used when the engine block's cylinders have been bored out to match this size during a rebuild, ensuring a proper fit on a freshly machined or slightly worn cylinder wall.

What is the purpose of the -12.5cc dish in the piston crown?

The dish in the piston crown is designed to reduce the volume of the combustion chamber. This helps to lower the overall compression ratio of the engine, making these pistons suitable for builds that require a specific compression target, often for forced induction or certain camshaft profiles.

Are the wrist pins included with these pistons?

Yes, this set includes the necessary tool steel wrist pins for installation. The manufacturer also notes that upgrades to 9310 and Turbo Tuff/DLC alloys are available for select part numbers, though this specific set comes standard with tool steel pins.

Specifications

Brand: Manley Performance
Part #: 598910CE-8
UPC: 807298094830

Manley Chrysler Hemi 6.4L -12.5cc Dish 4.100 Bore +.010 Over Size 1.210 Comp - Set of 8 E/D

Name: Manley Chrysler Hemi 6.4L -12.5cc Dish 4.100 Bore +.010 Over Size 1.210 Comp - Set of 8 E/D
Brand: Manley Performance
SKU: manley-performance-manley-chrysler-hemi-6-4l-12-5cc-dish-4-100-bore-010-over-siz-t14-119288
Price: 1269.53 USD
Availability: BackOrder

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Manley Chrysler Hemi 6.4L -12.5cc Dish 4.100 Bore +.010 Over Size 1.210 Comp - Set of 8 E/DPiston

Key Features

Fits Chrysler Hemi 6.4L engines.
Piston bore size is 4.100 inches, and these are +.010 inch oversize.
Features a -12.5cc dish for compression ratio tuning.
Constructed from domestic 2618 alloy forgings for strength.
Includes tool steel wrist pins for durability.
Piston ring lands and grooves are machined to exacting standards for improved ring seal.

This piston set is designed for Chrysler Hemi 6.4L engines with a 4.100 inch bore that is +.010 inch oversize. Always confirm compatibility with your specific engine build and machining requirements.

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About this part

Product Details

If you're rebuilding the engine in your Chrysler Hemi 6.4L and looking for a solid set of pistons to handle increased performance, these Manley Platinum Series pistons are a strong choice. They're designed to fit a 4.100 inch bore and are +.010 inch oversize, meaning they're intended for a cylinder bore that's been honed out by ten-thousandths of an inch to ensure a proper fit on a slightly worn or freshly machined block. The -12.5cc dish in the piston crown helps set your compression ratio, making them suitable for a wide range of performance builds.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to withstand high cylinder pressures and temperatures. They feature proven cam and barrel skirt profiles, which help reduce friction and wear on your cylinder walls while still generating power. The wrist pins are made from tool steel for durability, and the ring lands and grooves are machined to strict standards to ensure a good seal with your piston rings, which is critical for both power and oil control. Manley's unique manufacturing process allows them to machine the skirt and ring grooves in one operation, ensuring they are perfectly square to each other for optimal performance.

This set includes eight pistons, the wrist pins, and the necessary clips. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a successful engine build, always refer to the manufacturer's installation instructions for critical details like ring gap, bearing clearance, and assembly procedures.