What material are these pistons made from?

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

What is the significance 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 bore. This helps to reduce noise and wear on the cylinder walls while also contributing to overall engine power.

Are these pistons compatible with all Chevrolet Small Block engines?

These pistons are designed for a specific bore size of 4.040 inches and have a particular compression height and dish volume. It is essential to verify that these specifications match your engine's requirements and build plan before installation.

Specifications

Brand: Manley Performance
Part #: 591340-8
UPC: 807298026220

Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.250in CH, -2.50 CC

Name: Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.250in CH, -2.50 CC
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-small-block-piston-set-4-040in-bore-1-250in--t14-880257
Price: 962.04 USD
Availability: BackOrder

$962.04

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Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.250in CH, -2.50 CC. Forged from 2618 alloy for superior strength and performance.

Key Features

Fits Chevrolet Small Block engines with a 4.040 inch bore.
Features a 1.250 inch compression height and a -2.50cc dish.
Constructed from domestic 2618 alloy forgings for superior strength and performance.
Includes proven cam and barrel skirt profiles to manage cylinder wall contact and power.
Exacting standards for ring lands and grooves ensure enhanced ring seal and power output.
Manley's unique fixturing ensures ultimate ring groove to skirt squareness.

⚠️ 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

If you're rebuilding the heart of your Chevrolet Small Block engine, consider this forged piston set from Manley Performance. These pistons are designed for a 4.040-inch bore and feature a 1.250-inch compression height with a -2.50cc dish, making them a solid choice for many performance builds. Manley is a well-known name among professional engine builders for a reason; their commitment to strong, reliable components is evident in every set.

What sets these pistons apart is the use of domestic 2618 alloy forgings. This material is chosen for its exceptional strength, which is crucial for handling the increased pressures and temperatures found in performance engines. They also feature proven cam and barrel skirt profiles, which help manage piston-to-wall clearance for reduced noise and wear on your cylinder walls, all while contributing to power output. The ring lands and grooves are machined to exacting standards, which is key for achieving a good seal with your piston rings, leading to better compression and more power. Manley's unique manufacturing process ensures the ring grooves are perfectly square to the skirt, further enhancing the seal and overall performance.

This set includes premium chrome moly wrist pins, known for their durability. For those pushing the limits, Manley offers upgraded wrist pin options in other part numbers. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.