whats the best spark plug to run in a 1999 Pontiac firebird trans am 5.7

Asked by Dec 21, 2014 at 12:30 PM about the 1999 Pontiac Firebird Trans Am

Question type: Maintenance & Repair

which plugs are the best  for the 5.7  LS1 engine regular stock, platinum, or iridium ?

2 Answers

285

I like AC Delco

AC Delco what? regular, platinum, or iridium ?

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