Engineered specifically for the Chevy LS3, these Speedmaster flat top forged pistons feature a 4.065" bore size and are built to handle the demands of high-performance street and race applications. The forged construction provides superior strength and durability over cast alternatives, making them an excellent choice for boosted, nitrous, or high-compression builds where reliability under stress is critical.
With a 1.065" compression height and a .927" pin diameter, these flat top pistons are designed to deliver consistent compression ratios and optimal combustion efficiency in your LS3 engine build. Sold as a set, Speedmaster PCE305.1125.01 pistons are a straightforward upgrade for enthusiasts looking to build a stout LS3 short block with proven forged internals.
