What ever wire you can find with the lowest resistance. MSD's are the lowest have measured but they are $$$. Bosch mag-core's come in near the top of the heap and the price is reasonable. OE wires are great if your only concern is AM radio reception. Don't judge wires based on price. Take an OHM meter and once you get lowest resistance then you can move on to build quality and warranty. OEM wires do fit the nicest but fall far short of any performance standard and they are a perishable item in that they use a fiberglass core coated with carbon as a conductor. all of the spiral wound wires (MSD,Taylor,Bosh,etc...) use a metallic spiral and are not considered perishable meaning that they do not wear out electrically with age as the others do by burning the carbon off the fiberglass. Everyone will preach OE but how many other parts on their Trucks have been replaced with other than OE parts for performance reasons? Plug wires are no different.