Wiseco Pro Tru Street Oldsmobile 455 4.125in Bore 1.750in CH -15.00 CC Piston Set

This Wiseco Pro Tru Street piston set is designed for Oldsmobile 455 engines with a 4.125 inch bore. What you get in this box is a complete package for your rebuild: eight forged pistons, along with the necessary rings, pins, and clips. These pistons are forged from 4032 alloy aluminum right here in the USA, specifically in Mentor, Ohio. This material choice is a solid option for street performance builds, offering a good balance of strength and lighter weight compared to cast pistons.

Wiseco has included their ArmorGlide skirt coating on these pistons. This isn't just for looks; it helps reduce friction between the piston and cylinder wall, which can lead to quieter operation and better resistance to seizure, especially during those initial break-in miles or under demanding street use. The pistons also feature an AS-forged dome with specific crown features and oil drain-backs, which are important for managing combustion and oil flow within the cylinder. The included chromium alloy steel piston pins and Spirolox clips are well-made and designed to handle the stresses of a performance engine.

This set is intended for engine builds where you're looking for a reliable and well-built piston that can handle more than a stock replacement. While they are designed for street use, they are not CARB approved and cannot be shipped to California. Make sure to check the manufacturer's installation instructions for proper assembly and break-in procedures to get the most out of this set.