Callies APH-31Q-CS GM LSX 4340 Forged Steel Crankshaft 3.625" Stroke

The Callies APH-31Q-CS is a premium forged steel crankshaft designed specifically for GM LSX engine builds. Manufactured from aerospace-grade 4340 steel, this crankshaft features a 3.625-inch stroke for increased displacement and enhanced performance in high-horsepower applications.

Key Features:

• Forged from 4340 chromoly steel for exceptional strength and durability
• 3.625-inch stroke for increased displacement in LSX-based engines
• Compstar (CS) series design optimized for racing and high-performance street applications
• Precision-ground journals for optimal bearing fitment and oil clearance
• Nitrided surface treatment for increased wear resistance and fatigue strength
• Designed for use with aftermarket connecting rods and pistons

This crankshaft is ideal for serious engine builders looking to maximize displacement and power output from GM LSX platforms including LS1, LS2, LS3, LS6, LS7, and LSX376 engines. The 4340 steel construction provides superior strength compared to cast or nodular iron crankshafts, making it suitable for supercharged, turbocharged, and nitrous applications.