MSD shielded crank trigger straight pick up. This is the pick up you need if you are going to run crank trigger ignition on your race car. The wires in this pick up are protected in a stainless steel tube protecting them from broken blower belts and fire. It is a 3/8-24" mounting thread.. RBS SUPERCHARGERS. 12299 Loma Rica Dr Grass Valley, CA 95945 (530) 274-3835 (530) 274-3835