Manley Chevrolet LS 4in Stroke 4.030in Flat Top Pistons

If you're building a high-performance Chevrolet LS engine, these flat-top pistons from Manley Performance are a solid choice. Designed for a 4-inch stroke and a 4.030-inch bore, they're built to handle serious power. Manley uses domestic 2618 alloy forgings, which are known for their strength and ability to withstand the stresses of performance engines. This means you can push your engine harder, knowing the pistons are up to the task.

What sets these pistons apart is the attention to detail in their design and manufacturing. They feature proven cam and barrel skirt profiles, which help reduce friction and wear on your cylinder walls while still generating substantial power. The ring lands and grooves are machined to exacting standards, ensuring a tight seal with your piston rings. This improved ring seal is crucial for maximizing compression and getting the most power out of your engine. Manley's unique fixturing process allows them to machine the skirt and cut the ring grooves in one operation, ensuring the ring grooves are perfectly square to the skirt. This level of precision contributes to better engine performance and longevity.

These pistons come standard with premium Chrome Moly wrist pins, offering good durability for many builds. For those looking for even more robustness, Manley offers upgrades to 9310 and Turbo Tuff/DLC alloys on select part numbers. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. They are a component for engine builds and will require other parts like rings, connecting rods, and a crankshaft to complete an engine assembly.