I replaced all spark plugs with Genuine Audi NGK plugs and replaced all Ignition Coils as well.
I switched to brisk just because of the high amount of ngk knock offs and they are supposed to last a bit longer and or have less wear than the ngk I'm a step colder rr4ys they have been great.
After changing: Idles better and more consistent at 700~800 rpm range. Car drives smoother? Changing spark plugs made it visibly better.
NGKs are my go to’s
I've run Denso and NGK on E85 for 10k+ miles and numerous track days, with zero issues.
Holy shit - $75 spark plugs? I think my Honda plugs cost like $5 a pop for NGK iridium
Also, you should probably go with NGK spark plugs because if you put Bosch ones that are made in China/Russia you are going to have a baaaad time
Also I like the NGK sparkplugs more than Bosch.
Had some problems with Bosch plugs once.
I had plugs from Amazon ngk and I had a wicked misfire couple days after. Somehow the ceramic broke off.
Please use original plugs for the replacements. Just yanked out aftermarket NGK platinums because of a misfire. For some reason, Mazda and aftermarket plugs in my experience always resulted in a misfire.
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