You don't need upgraded injectors or hpfp for a run of the mill k04 setup. Only fsi motors need that
These worked for me but I did re-gap to 0.028" as I am stage 2 APR tuned and I read I shouldI put in these plugs today. Torqued to 22ft. lb. and gaped to 0.032". I did use a smear of that copper paste. The tips of my old plugs where dry and had like gray fuzz on them. I noticed that plugs #2 & #3 had oil above the thread line. Not on the threads themselves. Hopefully not an issue. This would have been a 15min job but was about 30 due to talkative neighbors
I was tuned on stratified but had no issue with NGKs, just make sure they're the right heat range and gap, but it looks like jedred covered that. I'd say also check them about every year or so. Mine got eaten up and the gap opened a good amount over time to the point where I was misfiring. Pulled the plugs and the gap was way bigger. Tossed in new plugs and it felt like it just got tuned all over again. Also I know the miles are low, but i'd check the timing chain tensioner if you haven't already and replace it if it's the old one.Thanks guys! Have noted them down and will get to ordering soon. My 2010 is just ticked over 55,000k ( 34k miles? ) and getting ready for it's first big service.