4.0 TFSI EA825 spark plugs NGK competition

8 special NGK competition spark plugs for many 4.0L TFSI engines. These iridium spark plugs have been specially developed for turbocharged engines with increased boost pressure and high performance. NGK Racing spark plugs with iridium electrode especially for high performance Heat grade 9 For power outputs above 800 hp, these iridium plugs should always be fitted to prevent engine damage. The plugs do not fit engine code DJPB.