DeutschTuning proudly offers NGK Iridium Heat Range 9 Racing Spark Plug DAZA 2.5TFSI/EA888/EA825 Colder Plug. NGK Iridium Heat Range 9 Racing Spark Plug (R7437-9) NGK Racing spark plugs are designed with extreme use in mind and meant to withstand the most grueling racing conditions. NGK Spark Plugs have been powering racing champions and can be found in every racing venue throughout the world.Intended for racing use only. The center electrode of the NGK Racing spark plugs has special configurations and designs to ensure durability and ignitability. Recommended for DAZA 2.5TFSI Stage 2+, EA888 Stage 2+, EA825 (4.0TT) Stage 1/2. Contact us after purchasing for gapping and torque values. COMES AS SET OF 4, V8 WILL NEED 2 SETS.