NGK TR6 V-Power Spark Plugs (Set of 8) (2007-2012 Shelby GT500/ 1996-2004 SVT Cobra/ 1996-2004 Mustang GT/ 2003-2004 Mach-1/ 2005-2009 Mustang V6/ 2002-2003 Harley Davidson F150/ 1999-2004 SVT Lightning/ 2013 SVT Shelby GT500 5.8L)

Replace your stock plugs with these NGK TR-6 Plugs, they are one step colder than stock. These are a must when changing out your supercharger pulley to create more boost. The colder plug will help prevent detonation from the increased heat the motor see’s from higher boost levels.