GM LS Piston Set 4.010 Bore -10.5cc

The GM LS Piston Set 4.010 Bore -10.5cc from RACE TEC PISTONS is a forged piston package engineered for serious LS engine builders and performance enthusiasts. This eight-piston set is designed for General Motors LS-series engines and delivers the precision geometry required for high-compression, high-RPM applications. Whether you're building a street performance engine or preparing for competition, these pistons provide the durability and dimensional accuracy that modern LS platforms demand.

Constructed through advanced forging processes, these pistons feature a dished crown design with a -10.5cc dish volume, optimized for specific compression ratios and combustion chamber matching. The 4.010-inch bore diameter accommodates LS engine blocks and pairs with 1.5 x 1.5 x 3.0 mm ring grooves for reliable seal integrity and minimal blowby. The forged construction provides superior strength under boost and high-load conditions compared to cast alternatives, while the precision machining ensures tight tolerances that minimize piston-to-wall clearance variation. Each piston in this set of eight is manufactured to exacting standards for balanced rotating assembly performance.

LS engine builders—from naturally aspirated street cars to turbocharged track machines—rely on RACE TEC PISTONS for their reputation in precision and longevity. The -10.5cc dished design is ideal for builders seeking increased compression without sacrificing ring land strength or clearance margins. Installation requires proper measuring and honing to specification, and these pistons pair seamlessly with quality LS connecting rods and crankshafts. Weighing 11.5 lbs for the complete eight-piston set, this package is ready for assembly into your next LS build.