| SLP now has available a pinning kit designed for GM LS-Based engines where the crankshaft and factory harmonic balancer does not use a keyway to positively locate and lock the stock harmonic balancer. In high-horsepower applications the harmonic balancer can spin on the crankshaft causing damage to the crankshaft and/or balancer. The pinning kit allows the crankshaft and harmonic balancer to be pinned together with a hardened steel pin without removing the harmonic balancer or crankshaft and is designed for supercharged, turbocharged, or other high-horsepower engine applications.
An alignment tool is provided to guide the supplied drill bit exactly into the correct spot to be pinned. Once the hole is drilled, the pin is inserted and the provided OE harmonic balancer bolt is inserted and tightened. All necessary hardware and detailed instructions are included.
NOTE: Some aftermarket crankshafts and harmonic balancers come with keyways while factory crankshafts and harmonic balancers do not. | 
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