Manley Chevrolet LS 4.125 Bore -31.00cc Extreme Duty Piston Kit

Built with domestic 2618 alloy forgings, these Manley Extreme Duty pistons are a solid choice for anyone rebuilding or upgrading a Chevrolet LS engine. The 4.125-inch bore size and -31.00cc dish volume are specific to certain LS engine configurations, making them a direct fit for those applications. Manley's signature cam and barrel skirt profiles are designed to help generate substantial power while also being gentle on your cylinder walls, which is crucial for longevity in a performance build.

You'll find that Manley pays close attention to the details that matter for engine performance. The ring lands and grooves are machined to strict standards, which helps ensure a better seal from your piston rings, leading to more efficient combustion and improved power output. They also use tool steel wrist pins for added durability, and for some part numbers, offer upgrades to even stronger alloys like 9310 or Turbo Tuff/DLC for extreme applications. Their unique fixturing process allows them to machine the ring grooves and the skirt in one operation, ensuring the ring grooves stay perfectly square to the skirt, which is vital for proper ring seal under load.

This kit is intended for serious engine builders who demand reliability and performance. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and break-in procedures.