Wiseco Pro Tru Street Chevrolet Big Block 4.320in Bore 1.270in CH 21.00 CC Piston Set

Forged from 4032 alloy aluminum in Mentor, Ohio, these Wiseco Pro Tru Street pistons are built for Chevrolet Big Block engines with a 4.320-inch bore. The 4032 alloy is a strong choice for performance street applications, offering a good balance of strength and lighter weight compared to cast aluminum. This set includes everything you need for a comprehensive rebuild: the pistons themselves, a set of rings, high-strength chromium alloy steel piston pins, and Spirolox retaining clips.

Wiseco has applied an ArmorGlide skirt coating to these pistons. This isn't just for looks; it's designed to reduce friction between the piston skirt and cylinder wall, which can lead to quieter operation and help prevent seizures, especially under demanding street conditions. The pistons also feature an AS-Forged dome with specific crown features and oil drain-back passages, further aiding in lubrication and heat management.

This is a complete set of eight pistons, ready to go into your Chevrolet Big Block build. While these are designed for street performance, remember they are not CARB approved and cannot be shipped to California. Ensure you check all local emissions regulations before installation.