Manley 592670C-8 Forged Piston Set 4.070" Bore 12.1:1 Compression 2618 Alloy

The Manley 592670C-8 forged piston set delivers race-proven performance for high-horsepower engine builds. Precision-machined from high-strength 2618 aluminum alloy, these pistons feature a -4cc flat top design with a 4.070" bore, 1.115" compression distance, and optimized geometry for 6.125" connecting rods and 4.000" stroke crankshafts.

Key Specifications:

• Bore: 4.070 inches
• Compression Distance: 1.115 inches
• Piston Type: -4cc Flat Top
• Compression Ratios: 12.1:1 @ 64cc, 11.8:1 @ 66cc, 11.3:1 @ 70cc, 11.1:1 @ 72cc
• Pin Diameter: 0.927 inches
• Weight: 412g (507g with pin)
• Ring Package: 1.5mm, 1.5mm, 3mm Total Seal

Premium Construction Features:

• 2618 aluminum alloy provides exceptional high-temperature strength and superior fatigue resistance for demanding applications
• Contour forgings optimize strength-to-weight ratio without grain-interrupting internal milling
• Single-fixturing manufacturing method ensures perfect ring groove to skirt squareness for maximum cylinder seal and horsepower
• Proprietary multi-step top ring groove machining delivers precise size, geometry, flatness, and finish
• Federal Form-Scan gauging validates ideal skirt indexing and polarity
• Offset wrist pin design reduces piston slap for quieter cold starts and improved performance
• Moly-coated skirts reduce friction and wear

Complete Package Includes:

• Forged pistons with precision-machined pin holes
• Tool steel wrist pins
• Roundwire locks
• Pressure balance grooves
• Total Seal ring package

Compression ratios calculated at 0.00" deck clearance, 9.240" deck height, and 0.042" compressed head gasket thickness. The lightweight yet robust design delivers long service life in high-performance and racing applications.