GM LS Piston Set 4.125 Bore -25cc.

The GM LS Piston Set 4.125 Bore -25cc from Race Tec Pistons is designed for builders and tuners focused on high-performance engine builds within the LS platform. This piston set is ideal for those looking to optimize their engine for naturally aspirated or forced induction applications, ensuring reliable power output.

Engineered specifically for a 4.125-inch bore diameter, the -25cc dish volume helps lower the static compression ratio, making it suitable for boost-friendly builds. The pistons are crafted using precision forging and controlled cooling processes, which contribute to minimal piston-to-wall clearance variability and consistent ring seal integrity. Additionally, the design features reinforced pin bosses and optimized skirt profiles to reduce friction losses.

Professional engine builders, performance shops, and dedicated enthusiasts will find this piston set beneficial for various applications, including street, strip, and road racing. It is compatible with LS1, LS2, LS3, and other derivative engine families, making it a versatile choice for high-performance builds.