What is the compression ratio impact of the -20cc dish?

The -20cc dish is a volume measurement that will lower the compression ratio compared to a flat-top or domed piston. The exact compression ratio achieved will depend on your cylinder head volume, head gasket thickness, and deck height.

What material are the wrist pins made from, and are there upgrades available?

These pistons come standard with premium chrome moly wrist pins. Manley also offers upgrades to 9310 and Turbo Tuff/DLC alloys for even greater durability in extreme applications.

Are these pistons compatible with all LT1 engines?

These pistons are specifically designed for direct-injected LT1 engines with a 4.065 inch bore and 4.00 inch stroke. It is crucial to verify your engine's specifications before ordering.

Specifications

Brand: Manley Performance
Part #: 560465CE-8
UPC: 807298096599

Manley Chevy LT1 Direct Injected Series 4.00in Stroke 4.065in Bore -20 cc Dish Extreme Duty Pistons

Name: Manley Chevy LT1 Direct Injected Series 4.00in Stroke 4.065in Bore -20 cc Dish Extreme Duty Pistons
Brand: Manley Performance
SKU: manley-performance-manley-chevy-lt1-direct-injected-series-4-00in-stroke-4-065in-t14-25437
Price: 1269.53 USD
Availability: BackOrder

$1269.53

On Backorder

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

Manley Chevy LT1 Extreme Duty forged pistons for 4.065" bore with a -20cc dish. Built for superior strength and durability in high-performance builds.

Key Features

These pistons fit engines with a 4.065 inch bore and a 4.00 inch stroke.
The -20cc dish helps achieve your desired compression ratio for performance builds.
Constructed from domestic 2618 alloy forgings for superior strength and performance.
Includes premium chrome moly wrist pins for added durability.
Features exacting ring lands and grooves to enhance ring seal and power output.
Cam and barrel skirt profiles are designed for power generation and cylinder wall protection.

These pistons are designed for Chevy LT1 engines with a 4.065 inch bore and 4.00 inch stroke. Check manufacturer specifications for complete compatibility details.

⚠️ 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

When you're rebuilding the heart of your Chevy LT1 engine for serious performance, the pistons are where you start. These Manley Extreme Duty pistons are built for direct-injected LT1 applications, specifically designed for a 4.065-inch bore and a 4.00-inch stroke, featuring a -20cc dish to help set your compression ratio.

Manley uses domestic 2618 alloy forgings for these pistons, which means they're incredibly strong and can handle the demands of high-performance engines. They also come with premium chrome moly wrist pins, and Manley pays close attention to the ring lands and grooves, ensuring a tight seal for better power. The cam and barrel skirt profiles are carefully designed to make good power while being easy on your cylinder walls, and Manley's unique machining process ensures the ring grooves are perfectly square to the skirt for optimal performance.

If you're building a high-output LT1, these pistons are a solid choice. Keep in mind that these are not CARB approved and cannot be shipped to California. You'll also want to check the manufacturer's instructions for any specific installation requirements or recommended components for your build.