Any one know about plugs that have a X after them. I have some R43TS then ran across some R43TSX what is the X for?
AC Delco spark plugs
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Re: AC Delco spark plugs
The X is for a .060 factory gap. The standard TS is a .035 factory gap that can of course be changed. However, stretching it out to .060 is a bit extreme. The -X version is already there.
There is also an -8 version that is a .080 gap.
As usual, you should always check your gap as the factory gap may not be accurate at time of installation.- Top
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