What is the significance of the +.020 inch oversize bore?

The +.020 inch oversize bore means that the cylinder walls in your engine block have been machined to be 0.020 inches larger in diameter than their original stock size. This is typically done to clean up imperfections or wear in the cylinder walls and to accommodate these specific pistons.

What is the compression ratio and dome volume, and what effect do they have?

This piston set has a 10.73:1 compression ratio and a 5cc dome. A higher compression ratio generally leads to more power and improved efficiency, while the dome volume affects how much space is left in the combustion chamber at the top of the piston's stroke.

Are these pistons suitable for all 6.1L Hemi engines?

These pistons are designed for 6.1L Hemi engines but are not CARB approved and cannot be shipped to California. It's essential to confirm that your specific engine build and local emissions regulations are compatible with these components.

Specifications

Brand: Manley Performance
Part #: 597680C-8
UPC: 807298061511

Manley Chrysler 6.1L Hemi 90.9mm Stock Stroke +.020in Oversize Bore 10.73:1 CR 5cc Dome Piston Set

Name: Manley Chrysler 6.1L Hemi 90.9mm Stock Stroke +.020in Oversize Bore 10.73:1 CR 5cc Dome Piston Set
Brand: Manley Performance
SKU: manley-performance-manley-chrysler-6-1l-hemi-90-9mm-stock-stroke-020in-oversize--t14-19312
Price: 1004.51 USD
Availability: BackOrder

$1004.51

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Manley Chrysler 6.1L Hemi forged piston set. +.020in oversize bore, 10.73:1 CR for improved performance.

Key Features

Fits Chrysler 6.1L Hemi engines.
Piston set is +.020 inch oversize bore.
Features a 10.73:1 compression ratio with a 5cc dome.
Constructed from domestic 2618 alloy forgings for superior strength.
Includes tool steel wrist pins for added durability.
Designed with cam and barrel skirt profiles for power and cylinder wall protection.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Manley Performance is well-known for building strong engine components, and their "Platinum Series" pistons are a popular choice among professional engine builders and tuners. This specific set is designed for Chrysler 6.1L Hemi engines and features a +.020 inch oversize bore, meaning it's meant for a cylinder bore that's been honed out by 0.020 inches from its original stock size. They also have a 10.73:1 compression ratio with a 5cc dome, which is a notable bump over stock and will help you get more power out of your engine.

These pistons are forged from domestic 2618 alloy, a material chosen for its strength and ability to handle the demands of a high-performance engine. They come with tool steel wrist pins for durability, and the skirt profiles are designed to be effective at generating power while also being gentle on your cylinder walls. Manley also pays close attention to the ring lands and grooves, ensuring a tight seal for better combustion efficiency and more power. The unique machining process they use ensures the ring grooves are perfectly square to the piston skirt, which is critical for proper ring seal.

This piston set is intended for builders who are looking to get the most out of their 6.1L Hemi. Keep in mind that these are not CARB approved and cannot be shipped to California. You'll want to ensure your engine block is prepared to the correct +.020 inch bore size before installation.