Wiseco Chevy Big Block 4.320in Bore 1.270in CH 25.00 CC Piston Set

If you're building a serious performance Chevrolet Big Block engine, Wiseco's Professional Series forged pistons are a solid choice. This set is specifically made for a 4.320-inch bore and features a 1.270-inch compression height, designed to work with a 25.00 CC combustion chamber volume. These aren't your average pistons; they're built from 2618 aluminum, which offers improved tensile strength, making them well-suited for heavy to severe duty racing applications where durability is key.

Wiseco machines these pistons right here in the USA, paying close attention to details like precision ring grooves, anti-detonation features, and additional ring seal improvements to ensure everything works together efficiently. The fully machined crown is ready for your build, and they even include forced pin oiling to keep things lubricated. Plus, they come with an ArmorGlide skirt coating that helps resist seizure, reduces friction, and contributes to quieter operation. This set includes premium rings, so you're getting a complete package ready for a demanding build.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. If you're pushing the limits with your engine, these Wiseco pistons are designed to handle the stress.