What material are these pistons made from?

These pistons are forged from domestic 2618 alloy. This material is chosen for its superior strength and performance characteristics, making it well-suited for demanding engine applications.

What is the purpose of the cam and barrel skirt profiles?

The cam and barrel profiles on the piston skirts are designed to optimize the piston's movement within the cylinder. This design helps generate substantial power while also minimizing wear on the cylinder walls.

What is included with this piston set?

This set includes the pistons and premium chrome moly wrist pins. For select part numbers, Manley offers upgrades to 9310 and Turbo Tuff/DLC alloys for even greater durability.

Specifications

Brand: Manley Performance
Part #: 590040-8
UPC: 807298024998

Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.550in CH, -2.50 CC

Name: Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.550in CH, -2.50 CC
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-small-block-piston-set-4-040in-bore-1-550in--t14-880225
Price: 838.21 USD
Availability: BackOrder

$838.21

On Backorder

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Manley Chevrolet Small Block Forged Piston Set - 4.040in Bore, -2.50cc Dish. Built for high-performance engines.

Key Features

Fits Chevrolet Small Block engines with a 4.040 inch bore.
Features a -2.50cc dish volume, crucial for setting compression ratio.
Constructed from domestic 2618 alloy forgings for superior strength and performance.
Includes proven cam and barrel skirt profiles that balance power generation with cylinder wall protection.
Exacting standards for piston ring lands and grooves ensure enhanced ring seal and more power.
Unique fixturing process ensures ultimate ring groove to skirt squareness.

This piston set is designed for Chevrolet Small Block engines with a 4.040 inch bore. Please verify compatibility with your specific engine build.

⚠️ 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's signature "Platinum Series" pistons start with domestic 2618 alloy forgings, a material chosen for its exceptional strength and performance under demanding conditions. These pistons are built for Chevrolet Small Block engines with a 4.040-inch bore and feature a -2.50cc dish, which is important for setting your compression ratio. Professional engine builders and tuners trust Manley for their commitment to superior performance and durability.

Beyond the strong forging, these pistons incorporate proven cam and barrel skirt profiles. This design helps generate substantial power while also being gentle on your cylinder walls, reducing wear over time. Manley also pays close attention to the ring lands and grooves, adhering to strict standards to ensure enhanced ring seal, which directly translates to more power. They even use unique fixturing that allows for skirt turning and ring groove machining in a single operation, ensuring ultimate squareness between the ring groove and the skirt. This level of precision is key for optimal engine function.

Included with these pistons are premium chrome moly wrist pins, known for their durability. For those looking for even more robustness, Manley offers upgrades to 9310 and Turbo Tuff/DLC alloys on select part numbers. When rebuilding or modifying your Chevrolet Small Block, these pistons offer a well-built foundation for a high-performance engine.