GM LS 7.519in Harmonic Balancer Non-SFI

The GM LS 7.519in Harmonic Balancer Non-SFI from Power Bond Balancers is engineered for serious LS engine builders and high-performance enthusiasts who demand precision crankshaft vibration control. A harmonic balancer absorbs torsional vibrations generated by the crankshaft, preventing destructive oscillations that can crack journals, loosen fasteners, and prematurely wear bearings. This non-SFI balancer is ideal for street performance, built engines, and applications where drag-strip certification isn't required, offering the same vibration-dampening technology at a cost-effective price point.

Built with an iron construction and finished in black powder coat, this harmonic balancer features internal balance design, making it compatible with internally balanced LS crankshafts—the most common configuration in modern GM performance engines. The 7.519-inch outside diameter integrates seamlessly with LS engine accessory drives and belt systems, while the internal rubber ring dampens harmonic frequencies without external moving parts that can fail under extreme RPM. At 11.4 pounds, this balancer provides adequate mass for stable vibration absorption across the full RPM range of supercharged, turbocharged, and naturally aspirated LS platforms.

Mechanics and engine builders installing the GM LS 7.519in Harmonic Balancer Non-SFI will find it essential for long-block assemblies running above stock power levels, where OEM balancers often fail to handle the added stress. Installation requires proper crankshaft keyway alignment and balancer bolt torque specification—standard for any LS build. This balancer pairs with 58-tooth trigger wheels, standard LS damper pulleys, and works across the complete LS family, including LS1, LS3, LS7, and truck variants, making it a versatile choice for street cars, race vehicles, and engine swaps.