Ignition System Components

NGK Spark Plug for the following applications: 07-12 GT500 5.4 4v under 21 PSI of boost with stock compression13-14 GT500 5.8 4v under 21 PSI of boost with stock compression03-04 Cobra under 20 PSI of boost with stock compressionSet of 8 colder spark...

NGK Spark Plug  TR61 range colder than stock on 96-04 GT. Recommended for Forced Induction Standard plug on Lightning 99-04, 03-04 Cobra & 07-10 GT-500 (Ea.) Colder plugs for use with GT40 Iron heads