Manley Chevrolet Big Block Piston Set - 4.560in Bore 1.270in CH, -20.00 CC

If you're building a high-performance Chevrolet big block engine, these Manley Performance pistons are a solid choice. They are designed for a 4.560-inch bore and feature a -20.00cc dish, which is crucial for setting your compression ratio. Manley is a well-known name in racing circles, and these pistons are built to handle serious power.

What sets these pistons apart is the material and the machining. They're forged from domestic 2618 alloy, a material known for its strength and ability to withstand high temperatures and pressures without deforming. This is important for maintaining a good seal and preventing detonation. The pistons also feature proven cam and barrel skirt profiles. This design helps them run true in the cylinder bore, reducing friction and wear while still allowing them to generate substantial power. Manley also pays close attention to the ring lands and grooves, ensuring they meet strict standards for a better ring seal, which translates directly to more power.

Included with these pistons are tool steel wrist pins, which are strong enough for most performance applications. For those pushing the absolute limits, Manley offers upgrades to even stronger alloys. The machining process is also notable; Manley uses unique fixturing that allows them to turn the skirt and machine the ring grooves in a single operation. This ensures the ring grooves are perfectly square to the piston skirt, which is critical for optimal ring seal and engine longevity. Keep in mind these pistons are not CARB approved and cannot be shipped to California.