Manley Chevrolet LS Piston Set - 4.125in Bore 1.065in CH, -20.00 CC

Built from domestic 2618 alloy forgings, these Manley pistons are made to handle serious power. The 4.125-inch bore size and -20.00cc dish volume are specific choices for certain LS engine builds, often found when increasing displacement or aiming for a particular compression ratio. The 1.065-inch compression height is also a key measurement that determines how the piston sits in the cylinder relative to the crankshaft, impacting valve events and overall engine geometry.

Manley's signature cam and barrel skirt profiles are designed to reduce friction and wear on your cylinder walls while still generating substantial power. They've also paid close attention to the ring lands and grooves, holding them to strict standards to ensure an enhanced ring seal, which translates directly to more power. For added durability, these pistons come standard with premium chrome moly wrist pins, and Manley's unique fixturing process allows them to machine the skirt and ring grooves in a single operation. This ensures the ring grooves remain perfectly square to the skirt, a critical detail for proper sealing and engine longevity.

These pistons are a popular choice among professional engine builders and tuners who demand superior performance and durability from their LS engines. If you're rebuilding a high-performance LS engine and need pistons that can withstand demanding conditions, this set is a solid option. Please note that these are not CARB approved and cannot be shipped to California.