ICT Billet Harmonic Balancer Bolt for GM LS/LT Engines — Single OEM-Style USA Made, Direct-Fit

ICT Billet's bolt is a direct-fit OEM harmonic balancer/crankshaft pulley fastener designed for GM Gen III–V small-block V8 engines, supplied as a single, USA-made replacement.

This replacement harmonic balancer (crankshaft pulley) bolt from ICT Billet is manufactured to GM OEM specifications and intended for engines in the LS/LT/LSX family. It addresses the factory requirement that a new balancer bolt be used each time the crank pulley is removed and reinstalled, providing correct thread engagement, clamp load and fitment for the listed engine applications.

Will this bolt fit my specific GM engine?

Yes—this bolt is compatible with most GM Gen III, IV and V small-block V8 engines, covering many LS and LT variants. It does not fit LS7, LS9, LT4 or LT5 applications, so confirm your engine code before ordering.

• Fits common engines: LS1, LS2, LS3, LS6, LSX, LQ4, LQ9, LM7, L33 and others listed.
• Compatible with 5.3L, 6.0L, 6.2L displacements in the Gen III–V families.
• Excludes high-performance supercharged models: LS7, LS9, LT4, LT5.

Why replace the harmonic balancer bolt when reassembling the engine?

GM specifies replacing the balancer bolt after disassembly because these fasteners are torque-to-yield or have engineered stretch characteristics. Reusing the original bolt can result in incorrect clamping force, which risks pulley misalignment or loosening under load.

• Ensures correct torque and clamp load every reinstallation.
• Prevents potential vibration or pulley slippage issues.
• Maintains factory-recommended safety and service practice.

What makes this ICT Billet bolt trustworthy compared with generic alternatives?

This is a genuine GM OEM-style bolt produced to meet original specifications and manufactured in the USA, which reduces variability in material grade and heat treatment that can affect performance. Buying a single, correct-fit OEM replacement helps preserve proper crankshaft and accessory drive function.

• OEM interface and dimensions for direct swap compatibility.
• Made in the USA for consistent manufacturing standards.
• Sold individually so you can source exactly the number needed for service.

How should I install this bolt and are there torque guidelines?

Installation should follow GM service manual procedures: clean threads, apply specified threadlocker if required, and torque to the factory torque or use the torque-angle method if specified. Always follow the vehicle-specific service instructions for sequence and final torque values.

• Clean crankshaft threads and inspect for damage before installing.
• Use the factory torque specification or torque-plus-angle method per GM manual.
• Replace the bolt any time the harmonic balancer is removed.

Who is this for? This OEM-style ICT Billet harmonic balancer crankshaft pulley bolt is intended for mechanics, DIY enthusiasts and professional shops servicing GM LS/LT/LSX engines who need a correct-fit, single replacement fastener. It's ideal when performing front-end engine work—timing cover removal, harmonic balancer repairs or any service that requires balancer reinstallation—on compatible Gen III–V small-block V8s where OEM fastener replacement is recommended.