This is the ONLY coil You'll want to use with the Ignitor 3 distributor or conversion kit. It has an incredible 110:1 turn ratio for maximum output from starting through high performance ranges. Features an epoxy case with aluminum heat sinks for the very best heat distribution over any oil-filled coil. Don't waste your money on any substitute! SHIPPED FOR FREE WITH SAME TIME DISTRIBUTOR PURCHASE. You must call us for this feature toll-free 1-877-253-7882 or firstname.lastname@example.org.