vs
Spark plug OEM BMW or Denso
I decided to go with the Denso Iridium Spark Plugs Part # 5304#4 and am VERY happy with them. My car runs better than it ever has. These plugs were a little expensive but still less than what the dealer wanted for OEM plugs. I definitely recommend them!
Pros: car runs better, highly recommended
Cons: a little expensive
Part number: 5304#4
if you're gonna go iridium get the denso's because they (denso) have a smaller tip on them allowing for a "cleaner spark" and therefore a greater chance for detonation....less missfires as someone else has already said....I've run them both and I'm very pleased with the denso's
Pros: cleaner spark, less misfires
I did not, and bought the Denso Iridiums. I have less misfires and slightly stronger gas mileage since install. Just my experience.
Pros: less misfires, stronger gas mileage
I like the Denso 3008's I've been using for a couple years now in my turbo.
Pros: long-term use, good performance
Vehicle:
Toyota
Part number: 3008
im using the denso 1k22 great plugs for ko4
Pros: great plugs
Part number: 1K22
I installed the Denso Iridium IK22's a couple of weekends ago, and i love them! They are 1 heat range colder than stock, i changed them out at 30k... The stock plugs were definitely gone, installation took 1hr. After i changed them out, the car ran tremendously smoother, and the car seemed more responsive all together.
Pros: tremendously smoother, more responsive
Mileage: 48280 km
After I replaced mk Denso Iridium IK22's with the bosch coppers the problem disappeared. It looked as if the electorodes on 2 of the Denso's were oddly eroded and were probably causing a misfire.
Pros: problem disappeared
Cons: electrodes oddly eroded
Part number: IK22
I was useing the Bosch +2's for about 4 months and switched them out for the Denso Iridium's, could definitely tell a difference.
Pros: noticeable difference
denso iridiums - changed to these a month ago, and car feels more responsive and smoother
Pros: more responsive, smoother
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