What material are these pistons made from?

These Manley pistons are forged from a domestic 2618 alloy. This material is chosen for its exceptional 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 skirt profiles are designed to help the piston run true in the cylinder bore. This design helps to minimize friction and wear on the cylinder walls while still allowing the piston to contribute to generating substantial engine power.

Are these pistons compatible with all cylinder heads?

These pistons have a specific dome volume (43.00 CC) and compression height (1.270 inches) that must be matched with your cylinder heads and crankshaft stroke. It's important to calculate your desired compression ratio to ensure compatibility with your chosen heads.

Specifications

Brand: Manley Performance
Part #: 697890-8
UPC: 807298078069

Manley Chevrolet Big Block Piston Set - 4.625in Bore 1.270in CH, 43.00 CC

Name: Manley Chevrolet Big Block Piston Set - 4.625in Bore 1.270in CH, 43.00 CC
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-big-block-piston-set-4-625in-bore-1-270in-ch-t14-880373
Price: 1007.00 USD
Availability: BackOrder

$1007.00

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 Big Block forged piston set for 4.625in bore with a 43.00 CC dome. Built for superior strength and performance.

Key Features

Fits Chevrolet Big Block engines with a 4.625 inch bore.
Forged from domestic 2618 alloy for superior strength and performance.
Features a 1.270 inch compression height and a 43.00 CC dome volume.
Utilizes proven cam and barrel skirt profiles for reduced friction and wear.
Exacting standards for ring lands and grooves ensure enhanced ring seal.
Includes tool steel wrist pins for added durability.

This piston set is designed for Chevrolet Big Block engines with a 4.625 inch bore. Please verify compatibility with your specific engine build and components.

⚠️ 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 big block engine, Manley's 697890-8 piston set is a solid choice. These pistons are forged from 2618 alloy, a material known for its strength and ability to handle the stresses of powerful engines. They feature a 4.625-inch bore diameter and a 43.00 CC dome volume, designed to work with specific cylinder head combinations for optimal compression. The 1.270-inch compression height means they'll pair with a particular crankshaft stroke and rod length to achieve the desired deck height.

Manley uses proven cam and barrel skirt profiles on these pistons. This design helps them run true in the cylinder bore, reducing friction and wear on the cylinder walls while still allowing them to generate substantial power. The ring lands and grooves are machined to exacting standards, which is crucial for a good seal between the piston rings and the cylinder wall. A tight seal means better compression and more efficient combustion, ultimately leading to more power. These pistons also come with tool steel wrist pins, adding to their durability under high load conditions.

When you're putting together a serious engine, details matter. Manley's manufacturing process includes unique fixturing that allows them to machine the skirt and cut the ring grooves in a single operation. This ensures the ring grooves are perfectly square to the piston skirt, which is essential for proper ring function and sealing. This attention to detail is why professional engine builders often turn to Manley pistons for their builds.