V-trimmed ground electrode promotes sharper spark focus Maintains stable operating temperature under all engine loads Fine-wire center electrode for greater ignitability Heat-Active alloy allows electrodes to reach optimal temperature Double Platinum Power - Premium Spark Plug. More Powerful Performance. Platinum center and ground electrode for greater wear resistance Champion Double Platinum Power spark plugs deliver more powerful performance. Featuring exclusive Heat-Active alloy, platinum fine wire center electrode and platinum pad ground electrode provide maximum life and sharper spark focus. Audi Lt. Trk.: 3.2L V6 (12-09) Audi Pass. Car: 3.2L V6 (11-08) Chrysler Pass. Car: 3.2L V6 (06-05) Jaguar Pass. Car: 4.0L V8 (03-00) Mercedes-Benz Pass. Car: 2.3L L4 (04-01), 3.2L V6 (04-02), 5.5L V8 (11-05) Saab Pass. Car: 2.0L L4 (11-00), 2.3L L4