ProCharger Crankshaft Pin Drill Fixture Kits

ProCharger crankshaft pin drill fixture kits are for use on GM LS engines with an ATI harmonic damper. On LS1, LS6 and LS2 engines, the crankshaft and factory harmonic balancer does not use a keyway to positively locate and lock the balancer. In high horsepower applications, the pulley can spin on the crankshaft, sometimes so severely that the crankshaft and balancer can be damaged. ProCharger pinning kits can help eliminate that problem.