I got a set of APR coils and Brisk Silver Racing ER12s plugs for around 200
Vehicle:
Volkswagen
Part number: ER12S
Owner reviews for spark plug
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Bosch should be the safest choice for German cars, but avoid their gimmicky "Plus 4" plugs that have 4 ground electrodes, unless that's what the car came with from the factory.
Pros: safest choice
Cons: gimmicky plugs
Bosch provides OE for VW spark plugs. Plug your vehicle into autozone and just buy the bosch ones. They come pregapped.
Pros: come pregapped
Vehicle:
Volkswagen Golf
My 2002 had a similar issue. In my case it was the spark plugs, $250 fix.
Pros: easy fix
Vehicle:
Subaru Outback
Got new NGK BKR8EIX pugs today and gapped them to 0.024". Originally, 0.030" according to my gauge. Very surprised when I removed the old plugs as they were all at varying degrees of tightness even though they were originally torqued to 25NM. Car runs great with the new plugs. No complaints so far.
Pros: car runs great
Cons: varying degrees of tightness
Next up was replacing the spark plugs and the distributor finger and distributor cap. Car ran noticeably better and smoother.
Pros: better and smoother
Vehicle:
Porsche
Autolite a103 gapped to .055" will give you about a 5hp increase and last around 30,000 miles
Pros: 5hp increase, long lasting
Mileage: 30000 km
Part number: A103
I've been pulling my CR8EIX iridium plugs out to check how they are burning a lot recently. I've been seeing some light ash deposits and high speed glazing and the iridium tips of the plugs are not as hot as I would expect them to be, i.e., they are not *white*.
Cons: light ash deposits, high speed glazing
Part number: CR8EIX
Bosch finewires suck dong and AFAIK are not OE for anything even though they claim they're OE for practically every car on the road.
Cons: suck dong
Bosch platinum are trash.
Cons: trash
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