Manley Chevrolet Small Block Piston Set - 4.040in Bore 1.250in CH, -4.00 CC

If you're rebuilding the heart of your Chevrolet small block engine, a solid set of pistons is crucial for reliable power. This Manley Performance piston set is built using domestic 2618 alloy forgings, a material known for its exceptional strength and ability to handle high performance demands. These pistons are designed to be a direct replacement for your stock bore size, with a 4.040-inch diameter and a -4.00 CC dish, which is important for setting your compression ratio.

Manley has incorporated proven cam and barrel skirt profiles into these pistons. This design helps them run true and quiet in the cylinder bore while still allowing for significant power output. The ring lands and grooves are machined to exacting standards, which is key for achieving a good seal with your piston rings, ultimately leading to more power and better efficiency. They also come standard with premium chrome moly wrist pins, and Manley's unique fixturing process ensures the ring grooves are perfectly square to the skirt for optimal performance.

For serious engine builders, these pistons are a well-known choice. They are designed to work with a 1.250-inch compression height, which is a critical measurement when calculating your engine's compression ratio and piston-to-valve clearance. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're aiming for a robust and powerful rebuild, this set offers the strength and precision you need.