Aged or arcing Mustang Spark Plug Wires, or Ignition Wires can cause bad fuel economy and performance. For optimum Engine Performance, you need to make sure your Mustang Spark Plug Wires & Spark Plugs are up to the task! LMR has many options from Ford Original Motorcraft, Ford Racing (FRPP), Taylor, Performance Distributors, & MSD with enough applications to service any late model Mustang application made!