Michigan Motorsports LS Crankshaft Bolt | Fits 4.8L 5.3L 5.7L 6.0L 6.2L Engines | LS1 LS3 LQ4 LM7 LC9 L96 | High-Strength M16x2 Bolt with Load-Spreading Washer

The Michigan Motorsports LS Crankshaft / Harmonic Balancer Bolt (SKU: MMHDBLS34) is a superior OEM-style replacement for GM LS engines from 4.8L up to 6.2L (excluding dry-sump LS3/LS7/LS9). Crafted from 180 ksi tensile strength chromoly steel, this M16×2 bolt outperforms factory one-time-use bolts with reuse reliability and extreme clamping strength. It comes with a thick load-spreading washer for even pressure distribution and fits all Gen III/IV LS engines (LS1, LS3, LQ4, LM7, LC9, L96). Torque to 215 ft·lb with 30-weight oil, providing exceptional durability during rebuilds or high-performance applications.

• High-Tensile Chromoly Construction – Made from 180,000 psi chromoly steel for greater strength and reusability compared to GM’s single-use bolt.
• Precise M16×2 Thread & 12‑Point 1‑1/16″ Socket Size – Offers correct fitment across LS 4.8–6.2L engines and works with common GM torque tools.
• Torqued to 215 ft·lb with 30 wt Oil – Recommended torque specification ensures proper clamp load and harmonic balancer seating.
• Includes Heavy-Duty Washer – Thick load-spreading washer minimizes washer deformation and protects crank snout under extreme torque.
• Wide LS Engine Compatibility – Direct fit for nearly all wet-sump LS variants including LS1, LS3, LQ4, LM7, LC9, L96, and many others; excludes LS7/LS9 and dry-sump LS3 models.