^^^^ your reply is mostly right demon, but there are exceptions.
most aftermarket wires are a spiral core style. they are low resistance, and necessary for performance coil packs, or ignition systems. for stock ignition, wires make zero diffrence. most people go about modding their cars all wrong. things like spark upgrades and fuel upgrades are prevenative mods really, or "supporting mods". a N/A contour has an ignition system and fuel system capable of producing to a number higher than one will reach N/A. if you want to make your car better, start off by getting air into the car faster, and out of the car faster. then, get it tuned. don't waste money on plug wires. if you want to play with spark, try different styles of plugs (in the stock heat range, to stay safe) try different plug gaps, etc. if you want a cool color, buy some wire loom or something, save your money for something better like headers or a catback or an intake or something like that. when you reach the day you have a turbo and a 3L and are blowing out spark, then try upgrading the stock stuff when you feel that it's limiting you.