Wiseco Chevy LS 4.000in Bore 1.165in CH 9.00 CC Piston Set

Wiseco is known for making well-built performance engine components, and their Professional Series forged pistons are a prime example of that commitment. If you're building a serious performance LS engine for heavy or severe duty racing, these pistons are designed to handle the extreme demands you'll put on them. They are engineered, forged, and machined right here in the USA from 2618 aluminum, a material chosen for its improved tensile strength under high stress.

These aren't just basic pistons; they're packed with features to ensure top performance and durability. You'll find precision ring grooves, an anti-detonation groove, and other features that improve ring seal. The piston crown is fully machined for accuracy, and they come with forced pin oiling to keep the wrist pins lubricated. Plus, the ArmorGlide skirt coating helps reduce friction, resist seizure, and operate more quietly, which is a notable benefit in high-performance builds.

This set includes eight pistons, each designed for a 4.000-inch bore with a 1.165-inch compression height and a 0.927-inch pin diameter. They are built to withstand the rigors of competitive racing. Please note that these pistons are not CARB approved and cannot be shipped to California.