MSD Ignition Tester Universal Wheel Bearing Spacer 5/16 in Diameter

5/16 in Diameter

and stainless steel hardware to secure microswitch to the bracket

Black zinc finish

High capacity extra heavy duty metal cased solenoid

MSD Ignition Tester Universal Wheel Bearing Spacer 5/16 in DiameterAs engine technology changes so does the need for ignition systems and a way to test them. MSD's ignition tester now has the ability to test not only traditional single coil ignition systems but also coil per cylinder applications. The 89981 tester even gives you the ability to create an RPM run and let the tester run through the RPM range. This allows you to see the ignition activate any accessories you may be running such as shifters, nitrous