Genuine GM Crankshaft Assembly 12641691 – Suits Holden Commodore VE/VF 6.2L LSA V8

Genuine GM Crankshaft Assembly 12641691 is a brand-new, factory-forged crankshaft designed exclusively for the GM 6.2L LSA V8 engine. Manufactured from premium 1053 and 4340 steel, this crankshaft offers exceptional strength, durability and performance for high-output and supercharged applications.

Designed specifically for LSA applications, this crankshaft features a 3.622″ stroke, integrated 58-tooth reluctor for the ECU crank position sensor, and an 8-bolt flywheel mounting pattern—making it the direct factory replacement or upgrade for your LSA rebuild.

Fitment:

• Holden VE / VF Commodore (6.2 L LSA V8)
• Holden Caprice / Statesman (6.2 L LSA V8)
• HSV Clubsport / Maloo / GTSR (6.2 L LSA V8)
• Any retrofit or performance build using the GM 6.2 L LSA V8 engine

Specifications:

• OEM Part Number: 12641691
• Engine Type: GM 6.2 L LSA V8
• Stroke: 3.622″ (92.0 mm)
• Flywheel Mount: 8-bolt pattern
• Reluctor: 58-tooth crank position sensor ring installed
• Material: Forged from 1053 & 4340 steel for high strength and fatigue resistance

Key Features:

• Genuine GM OEM component — exact factory specification for LSA engines
• Forged steel construction for maximum strength under high loads
• Integrated 58-tooth reluctor ensures accurate ECU timing data
• 8-bolt flywheel interface for compatibility with LSA flywheels and flexplates
• Direct-fit — no machining or modification required when used in LSA applications

Installation Tip: Ensure oil passages are fully clean and free of debris before installation. Use new main and rod bearings, follow specified torque sequences, and have the rotating assembly balanced if combining non-OEM components.