Side-gap
I read that you should regap them about every 15 - 20 k miles. They should be replaced when the center post is noticeably wearing.
Mike J.
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1997 F-250 HD (old style) Supercab 4x4 w/ 7.5l 460. Jacobs Electronics Ceramic 2000 plug wires, Side-gapped Autolite plugs,Synthetic Oil, K&N air filter, Tonneau cover and bedliner are my only upgrades so far.
Mike J.
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1997 F-250 HD (old style) Supercab 4x4 w/ 7.5l 460. Jacobs Electronics Ceramic 2000 plug wires, Side-gapped Autolite plugs,Synthetic Oil, K&N air filter, Tonneau cover and bedliner are my only upgrades so far.
Instead of trying to explain it, go here and here... www.performanceunlimited.com/sparkplugs.html
www.f150online.com/f150board/Forum10/HTML/000716.html
www.f150online.com/f150board/Forum10/HTML/000716.html


