We use only Autolite platinum plugs in every vehicle at my shop. Been using them for 30 yrs without a failure.
I have seen lots of failed plugs from Champion, Bosch, and those 'trick' ones.
Most of the techs that I respect (because they are very smart, and many have race cars), won't touch the two brands I mentioned.
Denso may be a good choice. I used them in my race motoX bikes. NGK is also a good choice.
Read those articles, as they discuss going colder plugs per a certain amount of HP increase.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
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