Wiseco Chevy 305 3.766in Bore 1.250in CH -3.00 CC Piston Set

If you're rebuilding the heart of your Chevrolet 305 for serious racing or heavy-duty performance, a strong set of forged pistons is where you start. This Wiseco Professional Series piston set is built from the ground up for demanding applications where reliability and strength are paramount. Each piston is forged and machined right here in the USA from 2618 aluminum, a material chosen for its improved tensile strength under extreme conditions.

Wiseco has packed these pistons with features that matter for racing. You'll find precision ring grooves, anti-detonation grooves, and other features designed to improve ring seal, which is critical for compression and preventing blow-by. The fully machined crown ensures consistent combustion chamber volume, and forced pin oiling helps keep the wrist pin lubricated under high loads. Plus, the ArmorGlide skirt coating helps reduce friction and resist seizure, contributing to quieter operation and longer life even in severe duty builds.

This set includes eight pistons, each designed for a 3.766-inch bore with a 1.250-inch compression height and a 0.927-inch pin diameter. Keep in mind these pistons are not CARB approved and cannot be shipped to California. For a high-performance rebuild that can handle the stress of racing, this Wiseco set is a well-built choice.