I'm running NGK 1675 PFR7S8EG plugs with OE R8 red top coils with APR Stage 2+ with no miss fires.
Pros: no miss fires
Part number: 1675 PFR7S8EG
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When I upgraded to R8 coil packs I swapped plugs to NGK Platinums and did nothing but thread em in and walk away. Nothing but great performance since.
Pros: great performance
Had these on my MKV and they made the car smoother too.
Pros: smoother car
Vehicle:
Volkswagen Golf
after installing the new plugs: 1- yes, the idle went down to around 780 (from 820-840) 2- the needle is rock steady.. you reeeeaaally have to fixate on it to see any fluctuation at all... 3- this is the weird one: power is smoother. Not "more power", but what I used to call "silky acceleration" when I raced Formula 5 years ago. hard to explain other than to say that the car outputs the same power without the drama, smooth... BTW, my car has 2100 miles on it.
Pros: stable idle, smoother power, silky acceleration
Vehicle:
Volkswagen
Mileage: 3380 km
Mine came out the box .028 and I left them as is. The plugs are 1 step colder so its already a plus. The car does run smoother through the rpm and does idle smoother.
Pros: smoother idle, smoother through rpm
I've had a slightly rough idle since my can was new (about 6500 miles now) Got an APR stage 1 tune a few months back and of course the idle was still rough. Finally got around to replacing the stock spark plugs with the APR recommended Denso IKH24 spark plugs and..... My idle is so damn smooth now I can't even feel the engine is on. This is what i expect the idle to be like on a new car but this being my 3rd 2.0T from the VAG family i know the idle is a little rough some times.
Pros: smooth idle, engine not felt
Mileage: 10461 km
Part number: IKH24
I put IKH24's in my car as a troubleshooting step earlier this week, due to a low RPM stutter I was getting and knowing I'd been about 15K miles on my stock plugs. They made a BIG difference in my car, much smoother idle when sitting at stoplights, and running a lot smoother under boost at lower RPM's as well. No noticeable difference in engine noise. In my case, this is likely a mix of stepping to a better plug as well as my original plugs just being weary after the ocean of extra power.
Pros: smoother idle, smoother under boost, no engine noise
Part number: IKH24
i bought ngk plugs and bosch platinum triple diode plugs and i got the coil pack off ebay.
Vehicle:
Volkswagen Jetta
In my experience, Bosch spark plugs are always terrible; fouling out within a month, that kind of thing...
Cons: fouling out within month
Vehicle:
Mazda
Subaru's like NGK (OEM) spark plugs and O2 sensors, respectively. They run poorly and will even throw codes if other parts are used.
Cons: run poorly, throw codes
Vehicle:
Subaru Impreza
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