Plug Question
Colin
1998 Z28
The TR5's are a "hotter" plug than the TR55's. *I* would not run them w/ *my* mods (400rwhp). Read the Technical stuff at the NGK link (above) and here: http://www.ngksparkplugs.com/techinf...qheatrange.asp
And, here: http://www.centuryperformance.com/spark.htm


