Wiseco 4.630 Big Block Chevy Quick 8 +4cc Dome 1.120CH Piston Set

Forged from 2618 aluminum right here in the USA, these Wiseco pistons are built for serious performance in your Big Block Chevy. The 4.630-inch bore size and +4cc dome volume are specific choices for certain high-performance engine builds, aiming to achieve a particular compression ratio and combustion chamber shape. The 1.120-inch compression height is also a critical measurement that dictates how the piston sits in the cylinder relative to the deck surface, which is key for proper valve timing and clearance.

Wiseco didn't hold back on the details here. You'll find precision ring grooves, an anti-detonation groove, and other features designed to improve ring seal, which means better compression and less blow-by. They've also applied an ArmorGlide skirt coating. This isn't just for looks; it helps reduce friction, makes operation quieter, and resists seizure, especially important when an engine is under heavy load. The fully machined crown ensures accuracy, and forced pin oiling helps keep the wrist pin properly lubricated under extreme conditions.

This set is intended for heavy to severe duty race applications. It's important to note that these pistons are not CARB approved and cannot be shipped to California. You'll want to confirm all other necessary components for your specific engine build, as this is a specialized part for demanding applications.