GM LS Piston Set 4.075 Bore -22.9cc.

The GM LS Piston Set 4.075 Bore -22.9cc from RACE TEC PISTONS is designed for builders and engine specialists aiming to enhance compression and performance in GM LS-series engine builds. This set includes eight forged pistons that provide the durability and precision necessary for both street and competition applications where controlling combustion chamber volume is essential.

Featuring a dished piston design, this set effectively reduces the compression ratio while maintaining structural integrity, making it suitable for naturally aspirated builds that target specific displacement or boost-friendly configurations. Each piston has a 4.075-inch bore diameter and a negative 22.9 cubic centimeter dish, which is engineered to lower static compression and enhance detonation resistance in high-boost or high-RPM environments.

This piston set is compatible with all GM LS-series engine platforms, including LS1, LS2, LS3, and LSx variants, making it a versatile choice for custom engine builds, engine swaps, and performance upgrades. The complete set of eight pistons ensures a balanced assembly and eliminates the need for sourcing individual parts, while proper installation requires honing to the 4.075-inch bore specification.