Wiseco Chevy LS 4.000in Bore 1.165in CH 5.00 CC Piston Set

If you're building a serious performance Chevrolet LS engine, this set of eight Wiseco Professional Series pistons is designed to handle the demands. These aren't your average pistons; they're forged from 2618 aluminum right here in the USA, giving them improved tensile strength for high-stress applications. The 4.000-inch bore size is common for many LS engine builds, and the 1.165-inch compression height is a key measurement for setting up your valve timing and piston-to-valve clearance.

Wiseco has packed these pistons with features for racers and builders who push their engines hard. You'll find precision ring grooves, an anti-detonation groove, and other features aimed at improving ring seal, which is crucial for maintaining compression and preventing blow-by under heavy loads. The fully machined crown ensures accuracy, and the forced pin oiling helps keep the wrist pins lubricated, reducing wear in a critical area. Plus, the ArmorGlide skirt coating helps reduce friction and resist seizure, contributing to quieter operation and longer life even in severe duty conditions.

This set is built for heavy to severe duty performance applications, meaning they're intended for engines that will be subjected to significant stress and high RPMs. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a robust LS engine build that needs pistons capable of withstanding extreme conditions, this Wiseco set is a solid choice.