vs
Spark plug Denso or BERU
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.
Pros: work great
I did Denso 3297 from RockAuto. They work great.
Pros: they work great
Part number: 3297
I've always used the Denso SK20R11 plugs in mine and been pleased.
Pros: been pleased
Part number: SK20R11
Denso iridium plugs, no more no less and no exceptions.
Pros: high quality, reliable
denso iridium. do them and they’ll be good for another 200k km or more
Pros: good for 200k km
Mileage: 200000 km
Denso and Bosch have worked well for us on a 1.6.
Pros: worked well
Vehicle:
Ford
Denso itv20 (5339) for stock/mostly stock. ITV22 (5340) step colder if more mods. I have only used itv22 since 2015.
Pros: good for stock
Cons: only for stock
Part number: 5339
I ran Beru RS7 plus which are one step colder when I tuned stage 1 and they didn't last at all. Might have been under 10,000 miles. Recently went with NGK plus that APR reccomends for stage 2 and so far so good. No misfires since.
Pros: no misfires
Cons: didn't last
Mileage: 10000 km
I had EPC light/limp mode and P303 as well about a month ago on my '12 GLI (APR Stage 1+) at 102K miles that recently had a walnut blast and new Denso plugs at around 101K miles. Swapped coil packs as well and still P303 with EPC light/limp mode.
Cons: catastrophic failure
Vehicle:
Volkswagen
Mileage: 101000 km
Skip them, they are junk and a waste of money.
Get a good single platinum plug like the Denso 4511.
Pros: good platinum plug
Cons: junk, waste of money
Part number: 4511
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