I bought the absolute cheapest plugs available ($1.50/plug), and they are branded "Denso Toyota Iridium" - I assume fakes, but my magnifying glass does seem to show an iridium tip, and they work great.
Spark plug Bosch MB - $26 AUD each (part SPVA6SIP80)
Plugs are by BOSCH. Post this job, it runs a lot better, and I mean a loooot!
I did Denso 3297 from RockAuto. They work great.
I've always used the Denso SK20R11 plugs in mine and been pleased.
if you want to save a bit and still want some quality get bosch plugs those are good too, I’ve used them before and they were pretty good as well.
No discernible difference to me, positive or negative. But since I am running APR stage 1, I followed APR's recommendation.
I've heard for many decades how bad Bosch spark plugs are and I figured the coils would be just as bad, if not worse.
Bosch spark plugs are junk.
This is why I don't use Bosch plugs. It goes back to the quad fire plugs with a platinum center electrode that would fall out.
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