If your running stock exhaust manifolds any good quality wire is fine. If your running headers which expose the wires to a lot more heat, or want a little performance boost, thats another story. I have Accel 8mm Super Stock Spiral Core wires, thes are the most economical of the high end stuff like Moroso, Taylor, or MSD. A custom fit set cost me about $25 at the local Pep Boys.