Chevrolet Performance LSX 4.125” Stroke 58X Reluctor Crankshaft

Build a high-performance LS engine ready for serious horsepower with this Chevrolet Performance LSX crankshaft, engineered to meet the demands of performance enthusiasts and professional engine builders alike.

Features and Benefits:
- 4.125″ stroke increases displacement and torque potential for larger LS builds
- 58X reluctor is compatible with modern LS EFI and ignition systems for precise timing
- 8-bolt flange for flexplates and dampers
- 4340 premium forged steel
- High tensile strength and fatigue resistance for high-load applications
- Same crankshaft used in Chevy Performance crate engines 
- Performance-ready design is ideal for street, race, and high output builds

This crankshaft features a 4.125″ stroke, making it ideal for larger displacement LS builds where added torque and power are goals. Manufactured from premium 4340 forged steel, this crankshaft delivers exceptional strength, toughness, and reliability, matching the same quality found in Chevrolet Performance crate engines. It includes a 58X reluctor tone ring compatible with modern LS engine management and ignition systems, ensuring accurate timing and smooth EFI operation. The 8-bolt flange provides a mounting surface for flexplates and harmonic dampers under high load.

Please Note: Balancing is required.

Vehicle Fitment:
- 1967-1981 Chevy Camaro
- 1964-1972 Chevy Chevelle/ El Camino
- 1964-1972 Pontiac GTO/ Lemans/ Tempest
- 1964-1972 Buick Skylark/ GS/ Special/ Sport Wagon
- 1964-1972 Oldsmobile Cutlass/ 442/ F-85/ Vista Cruiser
- 1971-1972 GMC Sprint
- 1964-1969 Beaumont
- 1967-1981 Pontiac Firebird
- 1968-1974 Chevy Nova
- 1971-1974 Pontiac Ventura
- 1973-1974 Oldsmobile Omega
- 1973-1975 Buick Apollo
- 1970-1972 Chevy Monte Carlo