What material are these pistons made from?

These Manley pistons are forged from a domestic 2618 aluminum alloy. This material is chosen for its exceptional strength and ability to perform under high stress and temperature conditions common in performance engines.

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 bore. This design helps to reduce friction and wear on the cylinder walls while still allowing the piston to generate substantial power.

Are these pistons suitable for all engine builds?

These pistons are a popular choice for performance-oriented Chevrolet Small Block builds due to their forged construction and advanced features. However, they are not CARB approved and cannot be shipped to California. Always consult with your engine builder to ensure they meet the specific requirements of your project.

Specifications

Brand: Manley Performance
Part #: 590135-8
UPC: 807298025094

Manley Chevrolet Small Block Piston Set - 4.035in Bore 1.250in CH, -2.50 CC

Name: Manley Chevrolet Small Block Piston Set - 4.035in Bore 1.250in CH, -2.50 CC
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-small-block-piston-set-4-035in-bore-1-250in--t14-880227
Price: 838.21 USD
Availability: BackOrder

$838.21

On Backorder

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 - 4.035in Bore 1.250in CH, -2.50 CC. Forged pistons for superior performance and durability.

Key Features

Fits Chevrolet Small Block engines with a 4.035 inch bore.
Constructed from domestic 2618 alloy forgings for superior strength and performance.
Features proven cam and barrel skirt profiles designed to reduce cylinder wall wear.
Exacting standards for piston ring lands and grooves enhance ring seal for more power.
Includes tool steel wrist pins for durability.
Moly skirt coatings on select part numbers help reduce friction and aid break-in.

This piston set is designed for Chevrolet Small Block engines with a 4.035 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

If you're building or rebuilding a Chevrolet Small Block engine and need pistons that can handle serious work, this set from Manley Performance is a solid choice. These are forged pistons, meaning they start as a solid block of aluminum 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.

Manley uses their signature 2618 alloy for these pistons, which is known for its strength and ability to withstand high temperatures and pressures. They also feature proven cam and barrel skirt profiles, designed to reduce friction and wear on your cylinder walls while still making good power. The ring lands and grooves are machined to very tight tolerances, which helps ensure a better seal for your piston rings, leading to improved compression and more power. Plus, many of these pistons come with a moly skirt coating, which further reduces friction and helps them break in smoothly.

This set includes tool steel wrist pins, which are strong and reliable for most performance applications. You'll also find that Manley's unique manufacturing process ensures the ring grooves are perfectly square to the piston skirt, which is critical for proper ring seal and overall engine health. These pistons are a popular choice among professional engine builders for a reason – they offer a great combination of strength, performance, and durability for your Small Block Chevy build.