LS-Series Balancer Bolt Except LS7

The ARP LS-Series Balancer Bolt (Except LS7) is a precision-engineered fastener designed for LS-series engine builds where reliability and proper clamping force are non-negotiable. This 16mm x 2.00 chromoly bolt measures 4.325 inches in length with a 12-point head configuration, delivering the exact specifications required for harmonic balancer installation on GM LS-platform engines excluding the LS7 variant. Black oxide finish provides corrosion resistance and professional appearance on builds demanding OEM-quality components.

The 1-1/16 inch 12-point head design accommodates standard socket wrenches and impact tools commonly found in performance machine shops and engine rebuild facilities. Chromoly construction offers superior tensile strength compared to standard steel, maintaining clamping integrity under the rotational loads experienced at the harmonic balancer interface. The black oxide coating resists oxidation in both ambient storage and high-heat engine bay environments, critical for balancer bolts exposed to sustained engine temperatures during operation and dyno testing.

This fastener is essential for LS engine builders, hot rodders, and machine shops performing complete power plant overhauls or harmonic balancer replacement on LS1, LS2, LS3, LS6, and other LS-platform variants (LS7 applications require different specifications). ARP's manufacturing standards ensure concentricity and thread pitch consistency, eliminating the risk of improper seating that could lead to balancer slippage or fastener failure under load. Users rebuilding carbureted or fuel-injected LS engines will find this bolt delivers the fit and clamp load specifications necessary for reliable long-term operation.