The single piece billet reluctor wheels from Aeroflow are specifically designed to suit all factory and aftermarket crankshafts. The crankshaft reluctor wheel gives the crankshaft position sensor a true reading of where the crankshaft is in relation to the engine. This allows your LS engine to operate at optimum efficiency and power. All surfaces on these reluctor wheels are machine milled not laser cut to ensure a smooth, strong signal. Available in both 24 tooth and 58 tooth to suit all versions of the GM LS series engines and in conversion cars or applications.