Manley 592505CE-8 Platinum Series Extreme Duty Flat Top Piston Set 4.005in Bore Chevy LS

The Manley 592505CE-8 is a Platinum Series Extreme Duty (CE) Forged Flat Top Piston Set designed for Chevrolet LS-series engines. This 8-piece set features a 4.005-inch bore diameter, a 6.125-inch rod length, a 3.622-inch stroke, a 1.304-inch compression height, a 0.927-inch wrist pin diameter, and a piston weight of 440 grams. The flat top design delivers a clean, efficient combustion chamber with LS-1, LS-2, LS-3, LS-6, and LS-92 valve pocket compatibility, with valve pocket depths of 0.185-inch intake / 0.130-inch exhaust.

The "CE" designation identifies these as the Extreme Duty Series, which includes a premium 9310 alloy wrist pin (P/N 42542: 2.300-inch length x 0.210-inch wall) for significantly increased strength and durability compared to the standard chrome moly pins — ideal for high-boost, nitrous, or high-horsepower applications.

Key Features:

• Extreme Duty Series — includes 9310 alloy wrist pins for superior strength
• Forged from domestic 2618 alloy for excellent strength-to-weight ratio
• Precision cam and barrel skirt profiles maximize power while protecting cylinder walls
• Manley's proprietary multi-step top-ring groove machining ensures exacting ring groove geometry for improved sealing
• Unique fixturing allows skirt turning and ring groove machining in a single operation for perfect ring groove-to-skirt squareness
• Flat top design with -4cc dome/dish value
• Compatible valve pocket depths: 0.185" intake / 0.130" exhaust (max valve sizes: 2.165" intake / 1.625" exhaust)

Compression ratios are calculated at 0.00-inch deck clearance, a 9.240-inch deck height, and a 0.042-inch compressed head gasket. Matching Manley ring sets (P/N 46110-8 standard or 46110ST-8 Total Seal) are available separately to complete the build.