Manley Chevy LT1 Direct Injected Series 4.00in Stroke 4.125in Bore -10 cc Dish Extreme Duty Pistons

If you're rebuilding the heart of your Chevy LT1 engine for serious performance, you need pistons that can handle the stress. These Manley Extreme Duty Pistons are built for direct-injected LT1 applications, featuring a 4.00-inch stroke and a 4.125-inch bore with a -10cc dish. They are designed to be a robust foundation for your high-performance build.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their exceptional strength, making them a solid choice for demanding engine builds. They also come standard with premium chrome moly wrist pins, and for even more durability, select part numbers offer upgrades to 9310 or Turbo Tuff/DLC alloys. The ring lands and grooves are machined to exacting standards to ensure a tight seal, which translates directly into more power. Plus, the cam and barrel skirt profiles are carefully shaped to generate power while minimizing wear on your cylinder walls.

What sets these pistons apart is Manley's unique fixturing process. This allows them to machine the skirt and ring grooves in a single operation, ensuring perfect squareness between the ring groove and the skirt. This attention to detail helps ensure a well-sealed combustion chamber and contributes to the overall longevity of your engine build. Keep in mind these pistons are not CARB approved and cannot be shipped to California.