GM LS Dished Piston Set 4.010 Bore -20cc

The GM LS Dished Piston Set 4.010 Bore -20cc from Race Tec Pistons is designed for serious engine builders and mechanics focused on high-performance LS builds. This piston set provides the necessary compression geometry and bowl design for forced-induction applications, turbocharged systems, and naturally aspirated stroker builds, where controlling detonation while maximizing power output is essential.

The -20cc dish configuration effectively reduces combustion chamber volume, resulting in a lower overall compression ratio compared to flat-top designs. This is a proven strategy for turbo and supercharged LS engines running on pump fuel. Manufactured with premium alloy materials and precision machining, these pistons ensure consistent wall thickness, proper pin fitment, and ring groove tolerances that withstand repeated high-RPM cycles.

Engine builders working with LS1, LS2, LS3, LQ4, and other LS-family blocks will find these dished pistons ideal for achieving significant cubic-inch gains. The design also enhances quench clearance management, reducing hot spots in the combustion chamber and promoting uniform flame propagation during the power stroke, making it suitable for both track-focused and street performance applications.