It's real simple. Use the plugs recommended for your truck UNLESS you have
done a bunch of real modifications on it. Why? If those plugs made any
difference in HP or emissions you would see them as factory issue. Take a
look at what racers and REAL high performance guys run and you don't see
these "performance" plugs anywhere and these are guys who drop 10,000
dollars on an engine to get 1 HP gain,if a plug could do it they would be
using them, but they don't. THEY ARE JUNK.
Personally I run Delco Rapid-fire in my vehicles.
"ryan" < email@example.com> wrote in message
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