What material are these pistons made from?

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

What is included with this piston set?

This set includes the pistons and tool steel wrist pins. Ring sets are sold separately and should be chosen based on your specific engine build requirements.

Are these pistons legal for use in California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 591030-8
UPC: 807298025896

Manley Chevrolet Small Block Piston Set - 4.030in Bore 1.550in CH, -2.50 CC

Name: Manley Chevrolet Small Block Piston Set - 4.030in Bore 1.550in CH, -2.50 CC
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-small-block-piston-set-4-030in-bore-1-550in--t14-880246
Price: 922.62 USD
Availability: BackOrder

$922.62

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 forged piston set. 4.030in bore, 2618 alloy, tool steel wrist pins. Not CARB approved.

Key Features

Fits Chevrolet Small Block engines with a 4.030 inch bore.
Constructed from domestic 2618 alloy forgings for superior strength and performance.
Features proven cam and barrel skirt profiles that help generate power while minimizing cylinder wall wear.
Includes tool steel wrist pins for added durability.
Piston ring lands and grooves are machined to strict standards for enhanced ring seal and power output.
Manley's unique fixturing ensures ultimate ring groove to skirt squareness.

This piston set is designed for Chevrolet Small Block engines with a 4.030 inch bore. Please verify compatibility with your specific engine build and crankshaft.

⚠️ 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, a solid set of pistons is crucial for performance and longevity. This Manley Piston Set is built for those looking to push their engine's capabilities, whether for street performance or track use. They feature a 4.030-inch bore size, a common size for many small block Chevy builds, and a compression height that works with a variety of popular crankshafts and connecting rods.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to handle high performance demands. The skirt profiles are designed to be efficient for power generation while also being gentle on your cylinder walls, reducing wear over time. You'll also find exacting standards in the ring lands and grooves, which is key for a good seal and maximizing the power your engine makes. Each set comes standard with tool steel wrist pins, offering solid durability for demanding builds.

These pistons are a popular choice among professional engine builders for good reason. The unique manufacturing process ensures the ring grooves are perfectly square to the piston skirt, contributing to better ring seal and overall engine health. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a serious engine build, these Manley pistons offer a well-built foundation.