Features Replace your failing OE crank trigger wheel with a premium MSD Crank Trigger Wheel Built from durable aluminum to ensure it lasts the long haul The most accurate way to trigger the ignition, it cannot be false-triggered Includes four magnets and mounting instructions to make installation as easy as can be Your MSD Crank Trigger Wheel is sold individually and backed by a limited warranty DescriptionWithout a doubt, the most accurate way to trigger your ignition, an MSD Crank Trigger Wheel is the upgrade you¡¯ve been looking for to complement your existing MSD Crank Trigger Kit.Manufactured from hard-wearing aluminum to ensure it lasts the long haul, this dependable component cannot be false-triggered. Each wheel includes four magnets and mounting instructions to make installation easy. Your MSD Crank Trigger Wheel is sold individually and protected by a limited warranty. Manufacturer InfoReturn Information