Manley 592405C-8 Forged Piston Set Bore Alloy Dish - 4.130 2618 11cc

The Manley 592405C-8 forged piston set is engineered for high-performance engine builds requiring precise dimensions and proven durability. Machined from high-strength 2618 alloy, these pistons feature a -11cc dish design with a 4.130" bore, making them ideal for demanding applications where maximum temperature resistance and fatigue strength are critical.

Key Specifications:

• Bore: 4.130 inches
• Compression Distance: 1.115 inches
• Rod Length: 6.125 inches
• Stroke: 4.000 inches
• Wrist Pin Diameter: 0.927 inches
• Piston Weight: 424 grams (520 grams with pin)
• Compression Ratios: 11.7:1 @ 64cc, 11.4:1 @ 66cc, 10.9:1 @ 70cc, 10.5:1 @ 72cc
• Ring Package: 1.5mm, 1.5mm, 3mm Total Seal design

Premium Construction Features:

• 2618 aluminum alloy forging delivers superior high-temperature strength and fatigue resistance for extreme conditions
• Contour forging process optimizes strength-to-weight ratio without grain-interrupting internal milling
• Single-fixturing manufacturing ensures perfect ring groove to skirt squareness for maximum cylinder wall seal and horsepower
• Multi-step top ring groove machining provides precise control of groove size, geometry, flatness, and surface finish
• Offset wrist pin design reduces piston rock at startup and improves overall performance
• Moly-coated skirts reduce friction and improve wear resistance
• Pressure balance grooves included as standard feature

Complete Kit Includes:

• Forged pistons with -11cc dish
• Tool steel wrist pins
• Round wire locks
• Total Seal ring package (1.5mm, 1.5mm, 3mm)

Federal Form-Scan gauging validates ideal skirt indexing to the pinhole and ensures proper skirt-to-skirt polarity. Precise pinhole machining results in exact compression distance and lock ring groove specifications. Compression ratios are calculated at zero deck clearance with a 9.240" deck height and 0.042" compressed head gasket thickness.