GM LS Dished Piston Set 4.030 Bore -10cc

The GM LS Dished Piston Set 4.030 Bore -10cc from Race Tec Pistons is a forged piston set engineered specifically for General Motors LS-series engine builds. This eight-piece set features a dished piston design with a -10.00 cc compression volume, optimized for forced-induction and high-compression naturally-aspirated applications where precise combustion chamber tuning is critical to engine performance and detonation control.

Each piston accommodates 1.5 x 1.5 x 3.0 mm ring grooves and is sized for a 4.030-inch bore diameter, making this set compatible with standard and overbore LS engine blocks. The forged construction provides the strength and thermal stability required in high-boost turbo and supercharger applications, as well as naturally-aspirated builds running elevated compression ratios. The dished crown geometry reduces the static compression ratio relative to flat-top designs, a critical specification when pairing these pistons with aggressive cam profiles, nitrous oxide systems, or forced-induction setups where knock margin must be managed to prevent detonation.

This piston set is designed for engine builders, performance shops, and serious LS enthusiasts preparing complete engine assemblies for road racing, drag racing, or street performance applications. Race Tec Pistons are known for precision forging and quality control, making them a reliable choice for builds where engine longevity and repeatable power output depend on accurate bore sizing, ring compatibility, and consistent compression volume across all eight cylinders.

The -10cc dish volume is a popular specification in the LS platform community because it allows builders to lower effective compression while maintaining structural rigidity in the piston skirt and crown. This specification supports modern fuel blends and tuning strategies that prioritize reliability over peak compression numbers, particularly in turbocharged and supercharged LS engines where boost and fuel octane determine safe power output more than static CR alone.