NGK (who makes the VW ones) offers upgraded Ruthenium HX ones for less money (NGK-supplied VW ones), with improved performance and longevity compared to their aftermarket Iridium-IX ones.
Guy was gunna charge me $720 USD for changing my serp belt and another $550 USD for changing just my spark plugs. That's $20 for the serpantine/drive belt, $150 for the belt tensioner and I think another like $120ish for spark plugs (B58 engine). So in total I saved myself roughly $1,000 just doing it myself.
Normally that's a result of a failed spark plug seal. If you have no other problems I would put new spark plugs in it and check them at the next oil change.
Currently using the NGK racing R7438-8 (NGK 4905)
I've ran Autolites on my racecar that runs in the 7's for 20+ years with no problem. They are the only thing I trust at the moment
I have eqt and the densos and they are smooth
Ruthenium HX 95125. Lots of good feedback on the forums, I’m using them out of the box gap and they’ve been great. About 5K miles so far
For a stock 4.3 you won’t see any performance difference regardless of what you put in there. Cheap copper plugs will work great but your going to be replacing them every 25-30,000 miles, iridium will probably last as long as the rest of the vehicle.
Don't use Bosch on 90s Toyotas.
My dad just returned a set of autolites. I installed them and had immediate misfire.
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