Manley Chevrolet LS Piston Set - 4.005in Bore 1.115in CH, -18.00 CC

If you're building a high-performance Chevrolet LS engine, this Manley Piston Set is a solid choice. These pistons are designed for a 4.005-inch bore with a 1.115-inch compression height and feature an -18.00 CC dish, making them suitable for specific compression ratio targets in performance builds. Manley is a well-known name among professional engine builders for a reason: their parts are made to handle serious work.

What sets these pistons apart is the material and the machining. They're forged from a domestic 2618 alloy, which is known for its strength and ability to withstand high temperatures and pressures better than cast aluminum. This is crucial for performance applications where stock pistons might fail. The cam and barrel skirt profiles are carefully designed to help generate power while also being gentle on your cylinder walls, which helps with longevity. Manley also pays close attention to the details, like the ring lands and grooves, ensuring a tight seal for better combustion and more power. They even use unique fixturing to machine the skirt and ring grooves in one operation, which helps ensure the ring grooves are perfectly square to the piston skirt. This level of precision matters for proper ring seal and overall engine health.

This set includes premium chrome moly wrist pins, which are strong enough for many performance builds. For those pushing the limits even further, Manley offers upgraded wrist pin options. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. When you're assembling your engine, always refer to the manufacturer's installation instructions for proper ring gap, piston-to-wall clearance, and assembly procedures.