Electrical pulses to the spark plugs are what ignite the raw fuel in each cylinder, and with forced induction engines having increased pressure per cylinder, a consistent and reliable pulse and electrical spark are critical for optimal fuel burn, in turn, making horsepower. Stay on top of unwanted misfires and unburned fuel with high performance replacement ignition coils for your high performing engine. This product is a direct or consolidated replacement part from the manufacturers application guide which is legal for sale and use on emissions controlled vehicles. Replaces OEM p/n: 12-13-8-643-360, 986221124, 12137619385, 12138678438, 986221124
