THEESE ARE CRAP!!!! Everyone I know that has used their products, cavie or not, has all had problems (my one friend had a fire due to his Neihoff rotor melting). The wires are made from cheap materials, so they won't last as long, or give you the performance that you need. You're best bet is to get Bosh wires from Canadian Tire (decent quality, not the best), or order something from www.jbodyperformance.com