What is the advantage of forged pistons over cast pistons?

Forged pistons are made by heating and hammering aluminum alloy, making them significantly stronger and more durable than cast pistons. This increased strength is crucial for high-performance engines that experience higher pressures and temperatures.

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

These profiles are designed to help the piston move smoothly within the cylinder bore. They help to minimize friction and wear on the cylinder walls, contributing to longer engine life and consistent performance.

Are these pistons compatible with all Chevrolet Small Block engines?

These pistons are specifically designed for a 4.040 inch bore size commonly found in many Chevrolet Small Block applications. It is essential to verify your engine's bore size and specifications to ensure proper fitment.

Specifications

Brand: Manley Performance
Part #: 590840-8
UPC: 807298036748

Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.125in CH, -4.00 CC

Name: Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.125in CH, -4.00 CC
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-small-block-piston-set-4-040in-bore-1-125in--t14-880244
Price: 878.75 USD
Availability: BackOrder

$878.75

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

Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.125in CH, -4.00 CC. Forged from 2618 alloy for superior strength and performance.

Key Features

Fits Chevrolet Small Block engines with a 4.040 inch bore.
Forged from domestic 2618 alloy for superior strength and performance.
Features a -4.00cc dish volume.
Includes premium chrome moly wrist pins.
Cam and barrel skirt profiles help reduce cylinder wall wear.
Exacting standards for ring lands and grooves ensure enhanced ring seal.

This piston set is designed for Chevrolet Small Block engines with a 4.040 inch bore. Please consult manufacturer specifications to confirm 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

If you're building a high-performance Chevrolet small block engine, this Manley Performance piston set is a solid choice. These are forged pistons, meaning they start as a solid block of aluminum alloy that's heated and hammered into shape. This process makes them much stronger and more durable than cast pistons, which is essential when you're pushing an engine hard. They're designed for a 4.040-inch bore and feature a -4.00cc dish, which is a common configuration for many performance builds.

Manley uses domestic 2618 alloy forgings for these pistons, a material known for its excellent strength and ability to handle high temperatures and pressures. You'll also find proven cam and barrel skirt profiles, which help the piston move smoothly in the cylinder while minimizing wear on the cylinder walls. The ring lands and grooves are machined to very precise standards, which is critical for getting a good seal with your piston rings. A good ring seal means more power and better efficiency. These pistons come with chrome moly wrist pins, which are strong and reliable for most performance applications.

This set is a popular choice among professional engine builders because of the attention to detail in their manufacturing. Manley's unique machining process ensures the ring grooves are perfectly square to the piston skirt, contributing to that all-important ring seal. While these pistons are built for serious performance, remember they are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.